• Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:

    • Tag FS2020 specific questions with the MSFS2020 tag.
    • Questions about making 3D assets can be posted in the 3D asset design forum. Either post them in the subforum of the modelling tool you use or in the general forum if they are general.
    • Questions about aircraft design can be posted in the Aircraft design forum
    • Questions about airport design can be posted in the FS2020 airport design forum. Once airport development tools have been updated for FS2020 you can post tool speciifc questions in the subforums of those tools as well of course.
    • Questions about terrain design can be posted in the FS2020 terrain design forum.
    • Questions about SimConnect can be posted in the SimConnect forum.

    Any other question that is not specific to an aspect of development or tool can be posted in the General chat forum.

    By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.

P3D v4 AIPFv3: Error Message

Hi everyone,

Just starting out with the AI world, so apologies for newbie question.

Have download and installed AIFPv3.2.09 and it appears to open and run OK, however when I go to the FILES menu and attempt to open/import a FLIGHTPLAN into AIPFv3, I receive the following ERROR message: (see Attachment).

I'm running AIFPv3 on Windows 10/64bit platform and AIFPv3 when launched recognises my P3Dv4 as the TARGET VERSION.

Any help or advice/guidance would be very much appreciated, or if there's any more info I can provide for you.

Many thanks for your time


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Resource contributor
You might want to attach a small flightplan file (zipped) that causes this problem?


Resource contributor
I suspect your have one or more applications enabled using add-on.xml file(s) that declare simobjects, and AIFP is having trouble reading the associated .xml files. Please attempt to isolate which add-on .xml files is causing the difficulty and send me the add-on.xml.

You can either post the file or e-mail it to me at don at stuff4fs dot com.

Hi Don, Tom

Tom, I have tried several different flight plans but they ALL give the same error.

Don, I've only just switched to P3Dv4 from FSX so I'm still finding my way around. The only .xml file I can find that appears to be linked to SimObjects is my A2A simulation file. (I've attached a copy for your attention Below). If this is not the file you require please let me know and any suggestions on how I can Identify the culprit file for you.

I really appreciate your Help.


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Resource contributor
John, that file was the culprit. AIFP was checking it for additional simobjects (as it should), but loaded the XML incorrectly.

Please download Development Release 3.2.09(j) from http://stuff4fs.com. That fixes the problem - on my system at least.

Hi Don,

Have followed your link and advice, but the Development Release file available for download is version 3.2.09 (i) .......... and NOT (j)

I have continued to download the (i) version anyhow and try it out, but unfortunately I'm getting the same ERROR result using this 3.2.09 (i) version.

I'll try again tomorrow, just in case the (j) version becomes available.

Great site by the way.

Many thanks


Resource contributor
Oops! Forgot to update the control file on the website. Please try again,

Yes, (i) will have the same difficulty but, with a little luck, (j) won't.

Hi Don,

Ok, I've downloaded the (j) version and Installed it. The results are as follows:

1) Launched AIFPv3 and selected File menu / Open Flight Plan ....... and choose a Plan.
2) a NEW ERROR message was reported. (copy of Error Attached).
3) Have also attached a copy of the C:\Users\John\Documents\Prepar3D v4 Add-ons\AI Traffic - Aircraft\add-on.xml..... file in question the error referred to.
4) When I closed the ERROR window down, the Error window did indeed close,..... and the flight plan I chose/selected then proceeded to load into the AIFPv3 application window as expected. (pic attached).

Hope this info may help you.



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Resource contributor
It's a different problem, but I an able to duplicate it. Thanks.

Look our for another development release.

Hi Don,

Thanks for the update,......... Absolutely Perfect.

and the best Technical Support I have ever received.

Have a great day Don and Many Thanks.

I have installed Windows 10 64 bit. I was never able to start FSX.
1- The FSX screen appears, Displays the message "Completing the installation, Generating the scenery file indexes".
2- Next: "Generating a database for new scenery files.
3- Then the Windows message appears: "Fatal error, Windows is looking for a solution to the problem".
4- "Microsoft Flight Simulator is restarting". Restarts.
5- Repeat the message 3.
6- "The program stopped working correctly due to a problem. Windows will close the program and notify you if a solution exists.


Resource contributor
Thanks for the kudos, John.

Bilia, FSX works fine under Win10/64. But, that being said, most of us will have installed FSX under an earlier operating system. Did you have FSX running under any other operating system on this computer? If not, perhaps FSX didn't install properly. Have you tried uninstalling and re-installing FSX? If FSX worked previously, why did you re-install it? Did you uninstall the previous installation? Is there anything unusual about this computer, the way you are attempting to use it or any unusual other programs installed? Are you having any other difficulties with this computer?

Until we have some insight into these areas, its impossible to assess where the problem might lie.

Also, this forum is devoted to AIFP, which is an addon application for FS/P3D. Perhaps you should also post in a more general FSX support forum.



Resource contributor
First, make sure you have not installed FSX into any Program Files folder. If you did, uninstall it and reinstall into a different folder (I use FS/FSX).


Resource contributor
It Works fine, in Windows 10 (even if it is installed in the Program Files folder, without "permissions" (UAC) being turned off).