Home/ Questions/Q 7459063
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-29T13:56:44+00:00

I have a project in C#, which references unmanaged third-party DLL (which is ChilkatDotNet2.dll

  • 0

I have a project in C#, which references unmanaged third-party DLL (which is ChilkatDotNet2.dll, but it seems not to matter). The third-party DLL is delivered in 2 versions, x86 and x64. The project references the x86 version – processorArchitecture=x86 in the appropriate <Reference> element. It builds just fine in both Debug|Any CPU and Release|Any CPU.

Now I change the reference to x64 version of third-party DLL – processorArchitecture=AMD64. (Don’t ask me why, please :)). The Debug|Any CPU builds just fine again. But the Release|Any CPU fails with the error: An attempt was made to load an assembly with an incorrect format: ChilkatDotNet2.dll.

What could be the reason? I would think it’s because VS itself runs as 32-bit process (right?), but why does it build fine in Debug?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Well, the problem seems to have hidden in the fact the project was upgraded from older versions of VS (I suppose, starting from 2005). I have re-created it from scratch, added all necessary stuff, and it works! Moreover, it became IDENTICAL to the bad one, and this makes me insane: one works, another doesn’t.

    So, I gave up since “the sun is rising? don’t touch anything there”. 🙂 Thanks to everyone who suggested options to try – I appreciate your efforts (+1).

    Accepting my own answer to mark the thread as complete, but don’t vote it up – it doesn’t contain useful info…

    • 0