OpusFSI Flight Simulator Interface for and

OpusFSI_v5_Overview  OpusFSI_v5_User_Guide  OpusFSI_v5_Getting_Started_Single_PC  OpusFSI_v5_Getting_Started_Networked_PCs  OpusFSI_v5_Live_Weather  OpusFSI_v5_Live_Camera  OpusFSI_v5_ButtKicker

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Getting Started - Single PC (continued)

General Operation

If you are using TrackIR then run TrackIR and the sim before running OpusFSI.

If you are not using TrackIR then the SERVER program should be run after FSX/Prepar3D, or you may configure your system to run the server program automatically each time you start FSX/Prepar3D.

When the SERVER program is activated it will resume its previous minimized or visible state, and will be displayed in its last known location on the screen. The SERVER program will automatically abort when the sim is shutdown.

To ensure optimum performance, the settings within FSX/Prepar3D should be configured in accordance with the instructions in FSX Computer System Settings section at the end of this guide.


Starting the OpusFSI Software Automatically with FSX and P3D

The SERVER program can be started automatically each time FSX/P3D is run, simply by editing the content of the standard FSX exe.xml file. 

The FSX exe.xml file can be found within the c:\Users\username\AppData\Roaming\Microsoft\FSX\ directory where 'username' identifies your login account name, or for XP in c:\Documents and Settings\Application Data\Microsoft\FSX\

The P3D exe.xml file can be found within the c:\Users\username\AppData\Roaming\Lockheed Martin\ Prepar3D\ directory where 'username' identifies your login account name.

If the file doesn't exist then you can create it using Notepad, just remember the xml file extension when saving the file.

Edit the xml file using Notepad. Paste the contents of the OpusFSI _ExeXml_Server.txt file at the end of the xml content. You should paste the content in just before the closing </SimBase.Document>  statement.

For example, after editing the content of the xml file, the content should look something like this for FSX/Steam/P3D (substitute the program argument P3D2,  P3D30,  P3D31, P3D32, or P3D33 for earlier versions of P3D).


<?xml version='1.0' encoding='Windows-1252'?>

<SimBase.Document Type='Launch' version='1,0'>






  <Name>OpusFSI_v5 Flight Simulator Interface Server</Name>


  <Path>c:\OpusFSI_v5\FSISERVER.EXE FSX</Path>



Of course you may already have several Addons listed in the xml file. In which case you will find each Addon specified within a separate <Launch.Addon> .. </Launch.Addon> block.

You will need to edit the c:\OpusFSI_v5\FSISERVER.EXE entry and specify the correct drive location if you have installed it anywhere other than the standard C drive.  

The SERVER program will accept a delay command line argument in the form DELAYn where n is the required start delay in milliseconds (e.g. FSISERVER.EXE DELAY2000 will delay the program start by 2 seconds). This argument can be used to delay an auto start within the simulator's EXE.XML file using the <CommandLine>DELAYn</CommandLine> entry, for example,



  <Name>OpusFSI_v5 Flight Simulator Interface Server</Name>





will delay the FSISERVER programs start by 2 seconds (2000 mS) and also automatically select FSX simulator type. The program arguments can be specified in any order. The program arguments are,


DELAYn ... Delays the program start by 'n' milliseconds.

FSX ... Auto selects FSX simulator type.

STEAM ... Auto selects FSE-SE (Steam Edition) simulator type.

P3D ... Auto selects the latest version of the Prepar3D simulator type.
P3D4 ... Auto selects the latest version of the Prepar3D version 4 simulator type.
P3D40 ... Auto selects the Prepar3D version 4.0 simulator type (or use P3D41, P3D42, P3D43, P3D44, P3D45 etc)
P3D3 ... Auto selects Prepar3D version 3 simulator type (P3D v3.4 onwards).
P3D30 ... Auto selects the Prepar3D version 3.0 simulator type (or use P3D31, P3D32, P3D33, P3D3, P3D34 etc)
P3D2 ... Auto selects Prepar3D version 2 simulator type (P3D v2 or earlier).
NONE ... Auto selects No Connection To Simulator type (CLIENT only).

When you next run the sim if you are prompted to trust OpusFSI then confirm Yes.  

In Prepar3D version 2 mode (requiring dotNet v2 SimConnect) the start up programs will activate the FSX server or client program. In all other Prepar3D version 3+ modes (requiring dotNet v4 SimConnect) the usual P3D server or client is activated.

Turn off  User Account Control (UAC)

User Account Control (UAC) can prevent OpusFSI from running automatically with FSX and P3D on Windows 7/8 systems. If this happens turn off UAC as follows,

1.      Open User Accounts by clicking the Start button, clicking Control Panel, clicking User Accounts and Family Safety (or clicking User Accounts, if you are connected to a network domain), and then clicking User Accounts.

2.      Click Change User Account Control settings (or Turn User Account Control on or off ). If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

3.      Move the slider bar to Never notify (or clear the Use User Account Control (UAC) to help protect your computer check box) to turn off UAC, and then click OK.  


Running the software automatically via FSUIPC

FSUIPC5.ini (OR FSUIPC4.ini) can be found in the FSX or P3D Modules folder.

You can add the following lines in FSUIPC5.INI (registered version) to run OpusFSI automatically,



Specify the location of your FSISERVER.exe file.

Run1 is a logical number/line sequence (in case you have/want more instructions).

The suffix FSX can be changed to P3D in the corresponding Prepar3D FSUIPC5.ini.  


Operating System Recommendations

Select the High Performance Power Scheme to ensure optimum performance whilst using the simulator. For Windows7 open Power Options by clicking the Start button , clicking Control Panel, clicking System and Security, and then clicking Power Options.


Simulator Recommendations

Ideally your simulator should be installed on a dedicated SSD or HDD, at the very least try and install your simulator on a different drive to your Addons, this will ensure the simulator runs more smoothly. Avoid installing the simulator in Program Files since this causes permission problems.  


FSX Steam Edition Recommendations

The OpusFSI_SimObjects_Template.txt text file can be copied and/or renamed to OpusFSI_SimObjects_FSXSE.txt, then edited to list the path specifications of any addon SimObject Airplanes and Rotorcraft folders not recognised by the SERVER program.


Prepar3D Recommendations

You will need to install SimConnect if it isn't already installed on your system. For P3D versions prior to v3.4 (.NET v2) either run the Microsoft.FlightSimulator.SimConnect.msi file within your OpusFSI_v5 folder or use the FSISERVER.EXE program argument P3D2 (or P3D30, P3D31, P3D32, P3D33). Running FSISERVER.EXE with the program argument P3D (or P3D4, P3D3, P3D34) will select .NET v4 variants of SimConnect and SlimDX.

You cannot start OpusFSI until P3D has loaded its flight, or a prepared Default flight (remember you can always relocate after the start up). Do NOT run OpusFSI when P3D has its 'Create Flight' dialog on display. This is due to a bug in P3D. We recommend you create a Default flight with nil wind; load the Default flight; update the weather using OpusFSI; use the ATIS over the radio to confirm the active runway after injecting the weather, this ensures the correct runway is allocated.

You can of course start P3D in the setup screen, just make sure you load your flight BEFORE running OpusFSI.

In P3D simulator mode the Enable Volumetric Fog option is set automatically using the VolumetricFog setting within the Prepar3D.CFG file. If you change this setting during a P3D session then either change the Enable Volumetric Fog Effect in OpusFSI to match P3D or restart OpusFSI.  The Volumetric Fog option is ignored whenever the Microsoft FSX simulator type has been selected.

It is recommended to use our PDK (Enable Prepar3D PDK Interface checkbox and setup help in the Configuration dialog) since this is more stable and efficient than the SimConnect interface. This requires copying a DLL file into the P3D Modules folder as described below.  

Prepar3D Version 3.x PDK Bug

The Lockheed Martin PDK Interface does not function correctly if you save a 'Default' flight with a Non VC view on display. In fact it does not function at all and will result in delays each time OpusFSI uses the PDK to adjust the zoom or eye-point in a VC view. Apart from causing serious delays, you will not be able to select or edit VC views nor will you get any DHM. Solution, if using the OpusPDK Interface you MUST save a Default flight or start up in VC view mode.

Both the SERVER and CLIENT programs will automatically use SimConnect 6DOF controls for all non-VC views whilst operating in Prepar3D v3 simulator mode. This measure is to overcome current bug in the Lockheed Martin PDK interface which does not allow 6DOF control in any 'Custom' External views.

OpusPDK Interface Setup Guide for P3D

The OpusPDK Dynamic Link Libraries (DLLs) provide a direct link into Lockheed Martin's Prepar3D systems via the Prepar3D PDK interface. This interface provides for efficient DOF control for camera transitions, panning sequences, and general eye point positioning. This interface is used where applicable for all Live Camera, Live Camera Control, and DHM eye point movements, including via the TrackIR interface.

There are four simple steps to setting up the Opus PDK interface,

1. Copy and rename the desired OpusPDK_vXX.DLL library file.

2. Copy the OpusPDK_vX.DLL into your <P3D>\Modules folder.

3. Create or edit the Prepar3D simulator's DLL.XML file.

4. Configure the OpusFSI software.

STEP 1 - Copy and Rename the OpusPDK_vXX.DLL file

This step is ONLY applicable to Prepar3D Version 3 systems.

Copy & Rename OpusPDK_v32.DLL to OpusPDK_v3.DLL ... P3D Version 3.2 systems.

Copy & Rename OpusPDK_v33.DLL to OpusPDK_v3.DLL ... P3D Version 3.4 systems.

Copy & Rename OpusPDK_v34.DLL to OpusPDK_v3.DLL ... P3D Version 3.4 systems.

On Prepar3D Version 2 systems simply copy, without renaming, the OpusPDK_v2.DLL into your <P3D>\Modules folder.

STEP 2 - Copy the OpusPDK_vX.DLL file

Before the OpusPDK library can be activated within Prepar3D the appropriate DLL must be copied into the simulator's <P3D>\Modules folder. This procedure must be undertaken on your main 'flying' server and in the case of Prepar3D Live View, on each of the P3D client systems as well.

a. Open Windows Explorer.

b. Navigate to your x:\OpusFSI_v5 installation folder.

c. Right click on either the OpusPDK_v2.DLL (P3D v2) or OpusPDK_v3.DLL (P3D v3).

d. Select the 'Copy' option.

e. Navigate to your Prepar3D installation folder.

f. Right click on the Modules sub-folder and select the 'Paste' option.

N.B. If the Modules sub-folder does not exist then create it before copying the DLL.

You should now have a copy of the latest OpusPDK_vX.DLL library file in your <P3D>\Modules folder.

STEP 3 - Create or edit the Prepar3D simulator's DLL.XML file

The Prepar3D DLL.XML file is located in the following folders,

  C:\Users\<user_name>\AppData\Roaming\Lockheed Martin\Prepar3D v2


  C:\Users\<user_name>\AppData\Roaming\Lockheed Martin\Prepar3D v3

You must edit this file using Windows Notepad and add the following Launch.Addon section to the XML file's content. When adding the launch code for the OpusPDK DLL in the Prepar3D DLL.XML file, the launch code should be inserted FIRST in the DLL list. This has been found necessary on systems with many Addon DLLs launched, the initialisation of the Lockheed Martin Prepar3D PDK interface seems to be quite critical and may result in crashing the P3D program if delayed until after a long list of non-PDK addons are loaded.

Add the appropriate Launch statements for the OpusPDK_v2.DLL for Prepar3D v2 or OpusPDK_v3.DLL  for Prepar3D v3 to your sim's DLL.XML file.

For example, for Prepar3D v3 ...

<?xml version="1.0" encoding="Windows-1252"?>

<SimBase.Document Type="Launch" version="1,0">













  . any other DLL launch codes



If the sim's DLL.XML file does not exist you can copy and rename the supplied DLL_V2.XML or DLL_V3.XML file from your \OpusFSI_v5 folder. You can also use these example XML files to copy and paste the required Launch statements. Remember to place the OpusPDK Launch statements FIRST in the DLL activation list.

STEP 4 - Configure the OpusFSI software

Before using the OpusPDK Interface you must edit the Configure dialog in the P3DSERVER program and all P3DCLIENT programs on your Live View client systems. Tick the Enable Prepar3D PDK Interface checkbox option immediately underneath the Prepar3D folder location box.


FSX Computer System Settings

fsx.cfg File Settings

You must edit your fsx.cfg file, this file can be found in,

c:\Users\<your account name>\AppData\Roaming\Microsoft\FSX

If you can't see the AppData folder within Windows Explorer then you will need to change the View settings as follows,

Organize - Folder and Search Options - View - Enable the 'Show hidden files, folders, and drives' option.

On all FSX systems we recommend you specify the following fields within in the fsx.cfg file,





These settings will allow FSX to make better use of the 64-bit memory environment with >2GB memory, and also support modern day wide aspect screens for addons such as PMDG 737NGX.

We also recommend you optimize all of your fsx.cfg files using,



FSX Settings

FSX menu option - Options, Settings, Weather, set to Custom (set slider bar to left).

Click on the Customize button. Select the Weather tab.

We recommend you set the Cloud draw distance to between 70mi/112km and 110mi/177km. The lower setting of 70 or 80 miles will be adequate for low level VFR, and anything from 80 to 110 miles for high level flying. The clouds at the range of the Cloud Draw Distance will either condense into view or dissipate out of view as you fly toward or away from them.

Untick Download winds aloft data with real-world weather.

Untick Disable turbulence and thermal effects on the aircraft. To see wing flex you must also select FSX turbulence and advanced animations which is set via the Graphics tab. For turbulence on the aircraft itself select both the Bump Aircraft and Turbulence effects options (Turbulent Motion and/or Turbulent Bump) within DHM.

FSX menu option - Options, Settings, Display, Graphics

Set the Target frame rate on the server PC to Unlimited. A word of caution, if you set your target frame rate too high then you may experience problems with the snow and rain effects. That is, you may see some snow and rain falling vertically whilst moving. This is an FSX problem and the only solution we've found so far is to restrict the machine's frame rate. If this is a problem then a setting of 20fps to 60fps should result in a smooth operation. On slower systems, or systems with slow hard disk drives, you may also notice the occasional screen flicker. Once again lowering the target frame rate should help.

To see wing flex you must select Advanced Animations and FSX turbulence (Weather tab).

FSX menu option - Options, Settings, click on the Realism button.

Disable Aircraft stress causes damage.

FSX Free Flight, Weather  

Set your FSX Current Weather to any weather theme, just don't enable the real world weather options unless you are using AI aircraft. 

If you are using AI aircraft then select RW Weather in the FSX Weather settings, update the FSX weather and ensure at least the correct wind has been injected. This requires that your point of departure is a met station and has a valid METAR in the Jeppesen database. This procedure will set the wind BEFORE the flight is even loaded. Now you can take your time, process your flight plan, specify your intended destination and cruise altitude and finally instruct Opus to generate and load the weather. The Opus LWE will automatically put the sim back into custom weather mode. Using this simple procedure will always ensure your AI traffic start out using the correct runway.

FSX Fixes

To stop FSX crashing on menu access, download this version of uiautomationcore.dll;


Unzip it and copy Uiautomationcore.dll into the main FSX installation folder.  

To stop clouds being turned off and back on apply this fix;  

Edit the file FSX\ShadersHLSL\misc\SwarmCloud.fx


Modify the EffectDeclaration entry as follows,

const bool EffectDeclaration


    string Name  = "SwarmCloud";

    string Class    = "Basic";

    bool   NewMaterialUsage = false;

> = true;

Browse to C:\Users\<username>\AppData\Local\Microsoft\FSX\Shaders\Misc

or C:\documents & settings\<username>\Local Settings\Application Data\Microsoft\FSX\Shaders\Misc

Delete the file SwarmCloud.fx_<number>


Virus Scanners

We recommend turning off all virus scanners whilst running FSX since they can have a serious effect on performance.

Disable Windows Defender.     


Recommended Settings and Practice for Dynamic Live Weather

* This will enable the cloud and visibility smoothing, wind stabilisation and dynamic wind control options in the Weather Smoothing dialog.

** If you specify a Max Cruise Altitude of 4000 feet or more the LWE will download and process the GRIB forecast data from NOAA.

*** If you have specified Background GRIB Processing in the Weather Downloads dialog then the GRIB data extraction and lengthy decoding will proceed at a slower pace and can take several minutes. Otherwise the processing will be done as fast as possible at the expense of the sim performance or frame rates. The GRIB data is only downloaded once before flight and the decoded data will be valid all day or at least for nine hours so this is normally not a concern or problem. However, most users need GRIB data for flight planning and preparation.

**** Before flight you should get into the habit of checking the weather. At the very least display and check the Opus Local, Lower, Upper, and Destination Weather reports. You may also like to examine the various Opus text reports accessed via the sim Add-on menu. There are separate reports showing the downloaded METARs, all the GRIB wind and temperature targets from 4000 feet up to FL540, all the en route weather for any specified flight plan including TAFs if you have enabled them, and finally an easy reference to all relevant SIDs and STARs. This report gives a handy direction and bearing for each listed SID and STAR.

The Opus weather reports (e.g. the Destination Weather) should be checked during climb and descent to monitor all wind and temperature targets, compared with the actual sim ambient conditions. This way you will know that your sim is operating as expected.

Never disable weather updates, the sim will NOT cope on its own it simply cannot contain all the necessary data.

Text Weather Reports, located in the OpusFSI_v5\Weather folder and accessed via the sim Add-on menu ...  

OpusWeather.txt ... The downloaded METARs

OpusWeatherReport.txt ... The GRIB data report

OpusFlightReport.txt ... The flight plan en route weather report

OpusSIDSTARReport.txt ... The relevant SIDs and STARs

Live Weather Assistant (LWA) and Weather Map data ...

Surface Visibility

Precipitation Levels

Surface QNH

Surface Temperatures

Cruise Level Temperatures

Upper Level Temperatures

Surface Winds

Cruise Level Winds

Upper Level Winds

Cruise Level Turbulence

Upper Level Turbulence

Lower Level Cloud Cover

Medium Level Cloud Cover

Met Station Cover

The LWA and up to six weather maps can be displayed on the server or a networked client.  


SimObject Path Additions

The OpusFSI_SimObjects_Template.txt file can be used to define a list of SimObject paths not currently identified by OpusFSI, normally addon aircraft that have been installed elsewhere and not defined anywhere that OpusFSI checks.

Copy and rename the supplied OpusFSI_SimObjects_Template.txt file. Rename the file as indicated below. OpusFSI will check and process the following sim typed files for the additional path specifications,


For backwards compatibility, the file OpusFSI_SimObjects.txt is also checked for 'FSX Steam' sim types.

Prepar3D systems should already include a 'simobjects.cfg' file within their common application data (c:\ProgramData) folder. These files are also checked and decoded by OpusFSI so try not to duplicate additional Simobject paths in the above text file if used. Your specified SimObjects folders should each contain the same Airplanes or Rotorcraft sub-folders as the standard SimObjects folder within the sim. The SERVER and CLIENT programs will accept SimObject Addon paths that end in specific sub-folder names '\Airplanes' or '\Rotorcraft' (with or without a trailing backslash). Previously the standard '\SimObjects' root folder was assumed and the sub-folder names '\Airplanes' or '\Rotorcraft' were appended prior to looking for the additional (addon) SimObjects.

Don't forget to check that any addon folders are shared with adequate sharing and security permissions.

Each path must be entered on a separate line in the form,
    Path = <full_path_specification>

For example,
    Path = E:\3rd Party\Company_XYZ\SimObjects

The SERVER and CLIENT create a log file named SimObjects_FSX.log, SimObjects_FSXSE.log, or SimObjects_P3D.log, depending on the sim type. This log file lists all SimObject Airplane and Rotorcraft paths that are checked along with any errors encountered during the process. The log file helps determine the reason why any aircraft/rotorcraft are not detected by the SERVER program.

Ensuring AI Traffic uses the Correct Runway

Create a Default flight with 0 wind. Load the Default flight. Update the weather using OpusFSI.

Use the ATIS over the radio to confirm the active runway after injecting the weather, this ensures the correct runway is allocated.

Using this simple procedure will always ensure your AI traffic start out using the correct runway.


FSUIPC Settings

FSUIPC is required on the SERVER system. FSUIPC is required on Live View CLIENTs that are connected to the simulator and used to display camera views.

You can download a free copy from http://www.schiratti.com/dowson.html

Turn everything off in FSUIPC, we recommend disabling all settings. We do not use FSUIPC for any weather or turbulence related effects.

If you choose not to install/activate FSUIPC then at the moment OpusFSI will not be able to pause the sim, it is normally paused when opening certain Opus dialogs. Hence you will have to pause and unpause the sim manually.

To disable FSUIPC simply remove the associated <Launch.Addon>...</Launch.Addon> entries within the simulator's dll.xml file.


  <Name>FSUIPC 5</Name>





TrackIR Settings

Before using the interface you MUST 'Check For Game Updates' within your TrackIR5 and ensure OpusFSX is listed in Titles under the Advanced Settings tab, then restart TrackIR.

Prior to using the TrackIR5 device via OpusFSI you must ensure TrackIR5 does not directly connect to the FSX/P3D simulator. To accomplish this you MUST rename the two SimConnect manifest files within the TrackIR5 installation folder. The folder is usually located in either,

c:\Program Files\NaturalPoint\TrackIR5 (Win 7 32-bit)
or, c:\Program Files (x86)\NaturalPoint\TrackIR5 (Win 7 64-bit)

BEFORE using the Opus TrackIR interface the files you MUST rename are simconnect.manifest and simconnectSP2.manifest

We recommend renaming these files to simconnect_RENAMED.manifest and simconnectSP2_RENAMED.manifest

If you wish to revert back to using TrackIR without the OpusFSI interface then you will have to change these files back to their original names.

Check your TIR manifest files after any TIR update, the TIR software can create new files after the upgrade.

Do not copy SimConnect.dll to your root directory otherwise TrackIR will find it and connect directly to FSX instead of OpusFSI.

Run TrackIR and FSX before running OpusFSI. Minimise the TrackIR program to prevent FPS loss.

Do not run any other program that controls the camera views, creates camera shake effects or interfaces to TrackIR. Make sure no such program or subordinate task is running, do not allow any other program to connect to TrackIR prior to OpusFSI.

TrackIR Tuning

TrackIR effects must be tuned using the TrackIR program. TrackIR can be used with the default TrackClip, or it can be used with TrackClipPro. TrackClipPro has its own LED emitters and its setup is very different from TrackClip, refer to the TrackClip and TrackClipPro sections below.

Make sure you have Video Processing Mode set to Precision or Standard with a Precision Mode Smoothing of 100. It has been brought to our attention that on some systems TrackIR can become very jerky if 'precision' is disabled, its default key assignment is F7 so it's possible to inadvertently change its setting if you use F7 to increase flaps. 


We would advise initially setting the Speed to 1 and the Smoothness to 50. You should experiment on your system and set values your PC is happy with to avoid any jerky DHM movements. Use the test options within the DHM dialog to see what the DHM should look like on your system, then try taxiing up and down in windowed mode and adjust your TrackIR smoothness to give you the optimum effect.

Make sure your Light Filter Threshold isn't set too high, try setting 70, and adjusting from there, with a max setting of 12 for your IR Brightness. Light pollution and an incorrect Light Filter Threshold setting are the number one main causes of flicker.


It has been reported that for TrackClipPro the Camera IR brightness should be zero and Light Filter Threshold should be set to a high value. The easiest way to get the correct settings is to click the TrackClipPro button in the TrackIR window and it will reset the Camera settings automatically.


TrackIR Flickering or Erratic Movement

Problems arise when the light threshold is wrong. If it is too low, extraneous lightsources in the room will falsely trigger TIR into seeing that other lightsource as one of the TrackClipPro's beams. This causes all kinds of false head-rotation issues, which show up as flickering.
The easiest way to solve the problem is to go into the TrackIR main view, right-click on the head-graph window, and choose Camera View, and then tweak the Light Threshold to a point where there is NO red 'false lightsources' visible anywhere during the full range of head movement. This can even change during the course of a day (depending on the intensity of reflected light from windows, eye glasses, items in the room etc.).

Your IR brightness levels should be zero. Try selecting the old Trackclip momentarily and then re-select TrackClipPro, and this should clear the IR settings back to zero (off). The TrackClipPro does NOT require the camera to send out IR signals (which are normally reflected off the front of the old Trackclip for the camera to pick up). Instead, the TrackClipPro generates its own light beams directly (that's why it's connected by wire and powered) - but of course, the camera can still get confused if there are large alternate light sources in the room competing with it.

Here is a handy little tip for fixing TrackIR jerkiness, http://airdailyx.blogspot.co.uk/2012/09/spf100-track-ir-adx-tutorial.html

Make sure you don't have any monitoring programs (e.g. FSUIPC autosave) running since they can cause TrackIR to become jerky.

Try enabling the Run TrackIR High Priority option in the Server Configuration dialog if TrackIR is not operating smoothly. You may need to try different versions of the TrackIR drivers to get it working smoothly on your system.  

TrackIR will not Connect to OpusFSI

If you update the TrackIR software remember to rename the two SimConnect manifest files within the TrackIR5 installation folder. 

Search your system and make sure there are no more manifest files located anywhere. Check your root directory and in fact search the entire PC for them. If TIR finds any manifest file it will not attempt to connect to Opus or anything else apart from the sim direct.

Try running everything manually and don't use any automated method. Run TrackIR manually after FSX, then finally run the SERVER, in other words do not run TrackIR and the SERVER automatically via FSX or FSUIPC. 

OpusFSI TrackIR Settings

Within OpusFSI set the TrackIR scan speed to 25 initially, the XYZ scaling to 1 and PBY scaling to 0.75. These can be adjusted on the fly from within the Configuration dialog. 

The TrackIR scan speed can be altered from 6ms to 60ms. If TrackIR is jerky then adjust this setting (try 25-30) in conjunction with your TIR device Speed and Smoothness settings to reach an optimum effect. If you set the scan rate too high it stutters, if you set it too low it jumps. 

The PBY setting should be adjusted in conjunction with the TIR device speed settings to determine the range of head movement and how far you can see behind you.

You may need to try different versions of the TrackIR drivers to get it working smoothly on your system.  

If you are still having problems with jerkiness after setting the TIR light levels then you can try enabling Run TrackIR High Priority  in the Server Configuration dialog.

TrackIR Operation

TrackIR can be enabled or disabled for each camera view within Live Camera, this is useful for instance when you want to adjust the GPS via a small click spot, if TrackIR (and DHM) movement is frozen you can operate the click spot no matter how unsteady your head is.

The TrackIR interface can be toggled on/off within the Cameras dialog (Toggle TrackIR On/Off button), allowing camera configuration and editing with the TrackIR device either on or off.  

TrackIR Cockpit Limits

To set up TrackIR cockpit limits refer to the OpusFSI_Live_Camera.pdf document.

TrackIR Updates

Check your TIR manifest files after any TIR update, the TIR software can create new files after the upgrade which you will need to rename again (see above for details).  


Using FS2Crew with OpusFSI

There can be an issue using FS2Crew since it relies on the 2D Panel initially being loaded. You can work around this by creating a 2D default camera view for your aircraft and follow the procedure below. Note this example procedure uses the NGX aircraft.

1. Start OpusFSI, enter Destination, Cruise level and any Alternates.
2. Start FSX, select Free Flight, setup flight then fly now.
3. Wait for NGX to initialize in 2D mode (20 second countdown).
4. Switch to 3D VC
5. Start FS2Crew.
6. Commence Preflight.

Using ActiveSky with OpusFSI

The OpusFSI Live Weather Engine provides the most detailed, accurate, and realistic weather available within the simulator. However, we have added an OpusAS Interface for those wishing to use ActiveSky weather. This interface can be used to factor in the ActiveSky 'AmbientTurbulence' and 'InCloud' Bootstrap DLL variables within the OpusFSI DHM (Dynamic Head Movements) at times when the OpusFSI Live Weather Engine is disabled and the ActiveSky Bootstrap DLL (as_btstrp.dll) is active. See the description below or the 'OpusAS_Setup.txt' file for details of how to enable and remove the OpusAS Interface.

Setting up the OpusAS Interface

1. Turn off the OpusFSI 'Enable Live Weather' option in the server program's Configure dialog.
2. Copy the OpusAS.DLL into the folder where your as_btstrp.dll file is located, normally this is in the simulator's as_srv sub-folder.
3. Edit the simulator's DLL.XML file and add the Launch statements for the OpusAS.DLL to the end of the file, usually immediately before the as_btstrp.dll Launch statements. The simulator's DLL.XML file can be found in your AppData Roaming folder. For example,

    C:\Users\<User Name>\AppData\Roaming\Lockheed Martin\Prepar3D v3
    C:\Users\<User Name>\AppData\Roaming\Microsoft\FSX

Please refer to the example DLL.XML file contents and the OpusAS Interface operating guide below.
Example DLL.XML file content for Prepar3D,

<?xml version="1.0" encoding="Windows-1252"?>
<SimBase.Document Type="Launch" version="1,0">
<Name>FSUIPC 5</Name>

FSX and FSX Steam would be similar without the OpusPDK launch statements at the top.

OpusAS Interface Operating Guide

The status of the OpusAS Interface is always displayed when you open the FSISERVER program's Spy window. If you open the program's Spy window before FSISERVER has had time to connect you should see messages such as,

    SIM Link Established with OpusAS (5.00.9)
    SIM OpusAS Library Version Validated

At all other times after opening the Spy window you should see the message,

    SIM Connected to OpusAS Interface (5.00.9)

All changes to the current DHM turbulence strength and frequency are reported in the Spy window. If AS is active and providing AmbientTurbulence and InCloud data values then the AS data will be displayed in brackets at the end of the line.

    MET DHM Turbulence: x/8 Freq y at Elev z ft (AS n, Cloud c)

Where, x = Turbulence Strength (0 to 8), y = Turbulence Frequency (0 to 5), z = current elevation in feet, and n = Enhanced AS AmbientTurbulence (0 to 2), c = AS InCloud flag (0 or 1).

N.B. ActiveSky is an invasive program and appears to interfere with or corrupt all SimConnect METAR request data, this data may not represent the true weather conditions at the aircraft's location. In most cases the surface wind, precipitation and cloud layer METAR data will be missing and no longer available to other addons. OpusFSI attempts to compensate for this by extrapolating other ambient data that is not affected by the AS DLL.

Re-Enabling OpusFSI Live Weather

The OpusFSI Live Weather Engine provides the most detailed, accurate, and realistic weather available within the simulator. Whenever you want to re-enable the OpusFSI Live Weather Engine simply remove the Launch statements for both our OpusAS.DLL and the ActiveSky as_btstrp.dll from the simulator's DLL.XML file.

Note, even if you use the ActiveSky tool for disabling the AS weather engine, the OpusAS.DLL Launch statements will still have to be removed manually. Hence, it's probably simpler to remove both Launch statements manually. Finally tick the 'Enable Live Weather' option in the OpusFSI server program's Configure dialog.

Uninstalling OpusFSI

If you wish to uninstall OpusFSI prior to an upgrade then uninstall via Control Panel, Uninstall a Program. Do not delete your OpusFSI_v5 folder (containing your configuration files) or Opus Software folder (containing your licence files).  

Can't uninstall OpusFSI/FSX

If you are having problems uninstalling Opus due to a misssing msi or registry corruption then use the following Microsoft utility, https://support.microsoft.com/en-gb/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed

Alternatively if you wish to remove OpusFSI completely from your system and have used Live Camera then first restore your aircraft.cfg files by disabling Live Camera in the Configuration dialog. A message box informs you that Live Camera is removing the Camera Definitions from all aircraft.cfg files for you. These changes will NOT be noticeable until you either restart FSX/P3D, or reload a completely different aircraft type forcing FSX/P3D to reload the modified cfg file. Uninstall OpusFSI via Control Panel, Uninstall a Program. 


FAQ and Troubleshooting

Can I use other software packages with OpusFSI?

We strongly recommend the use of 3rd party packages such as FEX for their sky and cloud textures, or HDEv2 (freeware) for clouds with the sky upgraded by Danny Glover. You will really see the benefit of using the OpusFSI Live Weather Engine with these textures loaded. We do not include or load any sky and cloud textures, we just create and load the most detailed and realistic weather. However, if you rely on the default sky and cloud textures within FSX/P3D then no matter how detailed the weather is it will not look very impressive. Disable the weather update in 3rd party packages to prevent conflict with the OpusFSI weather engine.

If your aircraft doesn't include sounds then we would also recommend the use of packages such as Accu-Feel for the sound effects but with the Accu-Feel global turbulence, chop, gusts, and clear air turbulence aircraft movement options disabled since they conflict with OpusFSI.

TrackIR can be used with OpusFSI but Automatic Head Movement will be automatically disabled.  

ButtKicker and ButtKicker compatible devices can be used with Opus.

How to Purchase

Follow the link from our home web page or display our downloads page and click on the OpusFSI v5 link in the Purchase or Reinstall column. Alternatively use this link, http://www.opussoftware.co.uk/opusfsi/OpusFSI_v5_Flight1_Purchase.exe 

Download the Opus Flight1 Purchase exe onto your main 'flying' server (sim) system to purchase the product. When you run the purchase file a Flight1 form with 3 buttons will be displayed. If you already have a Flight1 account click button 1 to log in (this is optional and if you get any Flight1 login error messages don't use it). Click on buttons 2 and 3 to fill in your purchase details and then the Purchase button will appear, click on this button to complete purchase.

After purchase, the Opus msi installation file will be unwrapped into c:\Opus Software along with your license key and you will receive an email confirmation of your order. Run the msi to install Opus and follow the instructions in our Getting Started guide.

I can't start my Flight1 downloaded application (it never runs), so I can't purchase the software

You need to make sure Data Execution Protection (DEP) allows the EXE to run. You can check your DEP settings by selecting Control Panel, System and Security, System, System Protection, Advanced tab, Performance Settings, Data Execution Prevention tab. Select "Turn on DEP for essential Windows programs and services only" option, or try to add the EXE you downloaded to the exception list.

Also, ensure that you have full Administrator access to the computer and you may need to disable any virus scanner or spyware program that is running.

If you still have problems refer to the Flight1 website troubleshooting.  

If all else fails then download it on another computer, make sure it runs, and then move it to your flight sim computer using the Flight1 licence transfer tool.

My payment was not accepted by PayPal

Email us for further assistance.

My virus scanner gives me a warning for the Flight1 downloaded application

Unfortunately, one of the most common issues when people can't get software to run is interference from a Virus or Spyware scanner. Although they do good things, in many cases they can interrupt programs you may want to run. If you get an error message that does not appear to be from the downloaded EXE, you need to make sure your virus or spyware scanner is disabled prior to running the EXE. If you are concerned about this, you can scan the file prior to running it, and then after your purchase, if you are prompted to automatically run the setup application, select No, then manually scan the setup application. This is usually extracted right after your purchase is made.
False-Positive reports with software is common.

'The cabinet file is corrupt' error message

If you see the error message,

The cabinet file '_xxx' required for this installation is corrupt and cannot be used. This could indicate a network error, an error reading from the CD-ROM, or a problem with this package

then it is most probably a corrupted msi file so just download it again. If you are using Chrome then try another browser.

I can't download Opus (signature is invalid or corrupt)

If you get a warning the signature is invalid then right click on the msi and select Run Anyway.

If you see the following screen then click on the More info button to run the software. Next select Run Anyway.

Using Windows Explorer navigate to the location of the downloaded file and run the software. If you have a problem running the software then right click on the file and click “Unblock" or follow one of the other methods in Can't run the msi in Windows.

Internet Explorer seems to be the most reliable browser for downloads. Try downloading on a different computer if possible. If you are downloading the purchase file on another computer, make sure it runs, and then move it to your flight sim computer using the Flight1 licence transfer tool.

If you are having problems downloading then make sure your anti-virus software is disabled, anti-virus software may also delete our software after it has been downloaded or installed unless you make the Opus exe programs  trusted applications.

'There is a problem with the windows installer package. A DLL required for this install to complete could not be run... ' error message

The installer doesn't have permissions to access the folder C:\Users\<name>\AppData\Local\Temp. 

Go to Properties > Security on the folder and give Everyone the Full control permission.

Can't run the msi in Windows

1. Turn UAC OFF.

2. Run the Command Prompt in Admin Mode (not the same as you being an Admin user).

3. Type: bcdedit /set testsigning off

4. Reboot. Windows will power up in a test mode and will allow you to run any msi file.

5. Install the msi file. After installing the software ...

6. Run the Command Prompt in Admin Mode (not the same as you being an Admin user).

7. Type: bcdedit /set testsigning on

8. Reboot

 After rebooting you should still be able to run msi files but may need to answer 'More Info' and 'Yes' to a Windows 10 user query.

System.TypeInitialisationException error

You need .NET version 4 for P3Dv3.4 onwards (.NET version 2 for FSX and before P3Dv3.4 systems) and SimConnect to be installed for OpusFSI and its SimConnect links to work.

You can check what versions of .NET you have installed in Control Panel by selecting Settings, System, Apps and features, then search for .NET and a list of installed versions will be displayed. For older operating systems you can check what versions of .NET you have installed by checking your c:\Windows\Microsoft.NET\Framework or Framework64 folders. You should see a v2.0.xxxxx folder in addition to the v4.0.xxxxx folder.

In the case of SimConnect, first make sure you have installed FSX or P3D along with its SP2, or installed the FSX Acceleration version, SimConnect is installed automatically with it. If you have mislaid or corrupted your SimConnect then you can try re-installing it for FSX (or P3Dv3.3 or earlier) using the Microsoft.FlightSimulator.SimConnect.msi file within your OpusFSI_v5 folder. 

For P3D we supply SimConnect_v3.4 dll. Copy and rename (to OpusFSI_v5 folder) if that is needed, otherwise the FSI startup program will copy and rename the v3.4 dll automatically when no LM dll exists. Alternatively use the FSISERVER.EXE program argument P3D2 (or P3D30, P3D31, P3D32, P3D33).  

The FSISERVER program argument P3D (or P3D4, P3D3, P3D34 onwards) selects the .NETv4 variant of SimConnect and SlimDX.

SlimDX error

Do not run P3DSERVER.EXE or FSXSERVER.EXE directly, instead run the FSISERVER.EXE program with the correct argument for your sim type.

If you still have problems you must ensure the FSISERVER program ...

Is starting in the correct c:\OpusFSI_v5 folder.

Has permissions to copy and rename the relevant SlimDX DLL file.

Is able to copy the current SlimDX DLL, it's not locked or write protected.

Is not blocked by AV or Win Defender software.


Otherwise its attempt to copy and rename the SlimDX file will fail. You may also need to install the SlimDX dotNet 2 or 4 runtime using our supplied msi file in the OpusFSI_v5 folder.

Opus won't run or aborts

If Opus won't run or immediately aborts then make sure it is installed in the OpusFSI_v5 folder in the root directory and not a sub-folder of the drive. Otherwise reboot your PC, this problem may be due to a windows update which needs a reboot of your PC. 

If this doesn't work then for FSX or P3D (prior to P3Dv3.3 inclusive) run the Microsoft.FlightSimulator.SimConnect.msi file within your OpusFSI_v5 folder. 

For P3D we supply SimConnect_v3.4 dll. Copy and rename (to OpusFSI_v5 folder) if that is needed, otherwise the FSI startup program will copy and rename the v3.4 dll automatically when no LM dll exists. 

Alternatively use the FSISERVER.EXE program argument P3D2 (or P3D30, P3D31, etc). 

The FSISERVER program argument P3D (or P3D4, P3D3, P3D34 onwards) selects the .NETv4 variant of SimConnect and SlimDX. 

When I install and run the SERVER it runs in demonstration mode

You must install the Flight1 purchase file on your C drive. You can move the msi to another location but must leave the OpusFSI_v5 and/or OpusFSI licence and key files on drive C in the C:\Opus Software folder.

Opus can only be installed on one drive in one folder. Uninstall any old versions of Opus using Control Panel, Uninstall a Program. Do not delete your OpusFSI_v5 folder though since your configuration (DAT and CMD) and camera (CAM, LIM and CDF) files are stored there, assuming you want to keep them.  

Check your OpusFSI_v5\FSISERVER.log for errors. 

If your Name and Order Number are blank in the Spy window then your licence file cannot be accessed due to either file permission problems or a corrupt licence file.

If you try and edit the licence file it will become corrupt, you should not open the licence file. If this has happened download and reinstall either,

Refer to Reinstalling Opus on a new or reformatted PC.

Your system will require a valid OpusFSI licence, internet access and the computer clock must have the correct time.  

Simulator's Installation Folder, Unable to access the installation folder...

Opus tries to copy the OpusWeather.WT weather file into the FSX\Weather\themes (or Prepar3D\Weather\themes) folder and will display this error message if it cannot do this.

If you see the above error message then it is essential that you check your installation folder is specified correctly in the Configuration dialog. Try reconfiguring the sim location again.

Also check your sharing and permissions, it is important to set permissions as well as sharing as described in the OpusFSI_v5 Getting Started guide.

Spy Error Messages

FSX Failed to establish link 1 with FSX
Error HRESULT E_FAIL has been returned from a call to a COM component.

This usually does not indicate a serious error, it usually means FSX is not running and hence, the software cannot connect to SimConnect. If you are running FSX it could mean you do not have SimConnect installed, or SimConnect is not functioning correctly.

You must have FSX installed on the main 'flying' server and each client computer system. You should also install the same scenery and aircraft addon packages. The aircraft addon packages need only be installed however if you want to use external 'aircraft' views on the client system. If this happens to be one particular client PC or laptop then install the aircraft addon just on that machine.

Note, you do not need to run FSX if you just wish to test the network connections or set up the SERVER and CLIENT programs.

Failed to establish link with FSUIPC

Error code 8

Error code 8 means you have the wrong Flight Simulator system for FSUIPC. Have you selected the correct simulator (FSX or P3D) in the OpusFSI configuration dialog and located its installation folder? If you have not then OpusFSI will be trying to connect to the wrong sim type!

Opus stops working

Make sure you only have one copy of Opus installed in Windows Control Panel using the Uninstall Programs option (not some Cleaner type package). 
All the FS... EXE and DLL files in the OpusFSI_v5 folder should have the same date, if they don't then uninstall Opus and reinstall.
The software looks for the licence and key files on drive C in your c:\Opus Software folder. 
Don't install Opus in the Opus Software, sim, or Program Files folders, and don't install in more than one folder on your PC.

FSX freezes or my aircraft will not move

The problem is caused by running both the Opus SERVER and CLIENT programs on the same PC. If you have a standalone system you must only run the SERVER or FSXSERVER program, do not run the client program that will freeze your sim (it is only intended to be run on networked client machines).

Before disabling 3rd party camera packages their configuration utility must be run and the "Restore" function selected to restore all camera views to FSX default, otherwise 3rd party camera definitions are not removed from the aircraft config files and can cause problems.

The master battery and parking brake indications aren't correct

You need to install FSUIPC on the OpusFSI client PCs. You can download a free copy from http://www.schiratti.com/dowson.html. FSUIPC is used for the following functions;
setting the sim clock, master battery and parking brake, and pausing the sim.  

Overspeed and Underspeed Warnings

If you are flying with the sim rate speeded up, especially above x6 then it is possible to get overspeeds or underspeeds. Even at x6 speed, your auto pilot or FSX may oscillate the air speed repeatedly causing repeated overspeeds. You should disable the FSX stress causes damage option.

Reinstalling OpusFSI on a new or reformatted PC

Download and run either,

If you have your licence and key files on drive C in the C:\Opus Software folder then choose the option to reinstall using the key file. If you purchased via credit card use the last four digits of the credit card as your password, otherwise use your order password (which is different to your login password). You can request your order password from Flight1 if you have forgotten it, you will have a different password for each Flight1 order.

If you have lost your licence and key files then choose the option to reinstall using your Flight1 account, you will need your email and account password. You can request your account password from Flight1 if you have forgotten it. You can also request your order password from Flight1 if you have forgotten it, there are different passwords for each Flight1 order. 
If you don't have a Flight1 account then you can create one and assign previous purchases to your account.

If you still can't reinstall then request a new key file from Flight1.

You may install the software onto any drive provided its folder name is OpusFSI_v5 with the exception that you must not install OpusFSI_v5 in the Opus Software, FSX, Prepar3D or Program Files folders, and don't install in more than one folder on your PC.


CPFlight MCP/EFIS 737PRO/EL (Device Driver No.1)

TOGA button

The TOGA button has been added to the CPFlight MCP737 panel driver on auxiliary input K121.

A/T Arm switch

The A/T Arm switch on the CPFlight MCP737 is automatically disengaged 2 to 3 seconds after landing.

Unable to Open COMn serial port !

Have you configured the wrong serial port number or forgot to connect power to the panel?

CPFlight MCP controls have stopped working with PMDG 737 NGX

There is a problem with PMDG's FSXPMDG.EXE software when you open an FSX dialog. If you have paused the sim then you must unpause it before any MCP changes will be effective.

Also if you stop OpusFSI_v5 and restart it, then after the panel is initialised you must make a change on the sim's MCP to kick the PMDG connection back into life.

Additional FAQs regarding weather, camera and network issues can be found in the relevant Weather, Camera and Getting Started user guides.

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