DllNotFoundException PInvoke issue

Question

During tests execution in Visual Studio 2013 (C# code) I have such error:

System.TypeInitializationException: System.TypeInitializationException: The type initializer for 'Teigha.Core.GlobalsPINVOKE' threw an exception. ---> System.TypeInitializationException: The type initializer for 'SWIGExceptionHelper' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'TD_SwigCore_4.00_10.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E). Aborting test execution.

My friend uses the same code branch on another computer. He has no such problems. All dll's are copied to TestResults\Deploy directory during build (TD_SwigCore_4.00_10.dll too).

I used

dependbin /DEPENDENTS TD_SwigCore_4.00_10.dll

to check dll dependents of this dll: KERNEL32.dll, USER32.dll, ole32.dll, TD_Ge_4.00_10.dll, TD_DbRoot_4.00_10.dll, TD_Gi_4.00_10.dll , TD_Gs_4.00_10.dll , TD_SpatialIndex_4.00_10.dll, TD_Br_4.00_10.dll, TD_Db_4.00_10.dll, TD_Root_4.00_10.dll, TD_Alloc_4.00_10.dll, MSVCP100.dll, MSVCR100.dll. I copied all this dlls to system32 folder so that all dlls would be loaded (https://msdn.microsoft.com/en-us/library/7d83bc18(v=vs.120).aspx). This doesn't help. Error still exists.

Answer 1

Solution for this issue was to copy missing dlls to directory: {Visual_project_directory}\bin\Debug. Files cannot be hidden inside some directories, they have to be copied straight into this directory. Missing dlls can be found by using dumpbin (it is installed with Visual Studio, in one of its directories) or Dependency Walker.