BadImageFormatException

FMOD Engine
1

Hi,

I’m using the C# API from fmodstudioapi20314win-installer.exe
The application is 64-bit / Windows.

Debug version works fine loading fmodstudioL.dll and fmodL.dll
Release version fails to load fmodstudio.dll with:

System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (0x8007000B)
at FMOD.Studio.System.FMOD_Studio_System_Create(IntPtr& system, UInt32 headerversion)
at FMOD.Studio.System.create(System& system)

I double checked that I copied the right files:
"c:\Program Files (x86)\FMOD SoundSystem\FMOD Studio API Windows\api\studio\lib\x64\fmodstudio.dll"
"c:\Program Files (x86)\FMOD SoundSystem\FMOD Studio API Windows\api\core\lib\x64\fmod.dll"

I also checked that the dll is 64-bit.

Is there anything I might do wrong here?

2

Hi,

Thanks for bringing this to our attention. We can use dumpbin to confirm the correct architecture

From

C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207\bin\Hostx64\x64

(Or your install of Visual Studio)

Can you please run

.\dumpbin.exe /headers "C:\Program Files (x86)\FMOD SoundSystem\FMOD Studio API Windows\api\studio\lib\x64\fmodstudio.dll" | findstr machine

And share the output which should look like 8664 machine (x64). If not, please remove the | findstr machine and share share the full output of the logs. If it is outputting the correct version, would it be possible to reinstall the engine can check if it is working as expected?

3

Ok, it was totally an error on my part.

The C# wrapper assembly I put together was called FMOD.csproj
When loading the (correct) fmodstudio.dll it tried to load the managed FMOD.dll instead of the correct fmod.dll…

In the Debug version I used fmodL.dll and fmodstudioL.dll so there was no name collision there.

4

Thank you for sharing the solution.