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PMDG777, RAASPRO and missing fs2audio.dll in Windows 10

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I recently made a clean install of Windows 10 on a new hard disc, and all is fine - with one exception: everytime I start FSX with RAASPRO enabled, I now get the following error message:

'The FS2AUDIO.DLL Failed to load with Error Code 0x7e. Be sure the FSAUDIO.DLL is in the \Windows\System32 folder, then restart the application.'

The problem is that this file doesn't exist anywhere in my system, and never has. In Win7 all was fine, despite it having no FS2AUDIO.dll either. (I still have my old Win7 hard disc with all programs, and made a search).

I have tried the following, without success:

1. Searched (read: combed!) the net for a possible solution, found nothing that helped.

2. Copied a FS2AUDIO.DLL from an old b-737 download I found, however this file is completely ignored by RAASPRO. (Also copied it to SysWOW64)
3. Made a repair of the Acceleration installation.
4. Uninstalled and reinstalled the PMDG 777. (Version 1.10.6492)
5. Rebuilt the Fsx.cfg (just to do something, a 'hit'n miss thing')


I tried posting about this problem in the PMDG777 forum, from where I was redirected to this forum, as this was assumed to be the most relevant.

What have I overlooked, (and what is and where is this elusive fs2audio.dll)?


(As a temporary solution I have disabled RAASPRO, getting rid of the error message.)

Kind regards


Bo Thuesen

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Hi again


Update: I just found and installed the update to ver. for my locked version, and thought that I had the solution, but alas, it didn't change anything, same error message..




Bo Thuesen

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