DLL Not Found - Exception Thrown in NewtonWrapperPINVOKE+SWIGExceptionHelper::

[xemjeff]

I have built Newton Dyanmics and the NewtonUnityPlugin in visual studio 2019. No errors on build in either project.

When I try to load the project: demo_04_StandardJoints in Unity (v 2017.3.1f), I get this error.

DllNotFoundException: NewtonWrapper
NewtonWrapperPINVOKE+SWIGExceptionHelper..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for SWIGExceptionHelper
NewtonWrapperPINVOKE..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for NewtonWrapperPINVOKE
dNewtonWorld..ctor ()
NewtonWorld..ctor ()

[xemjeff]

Solution to this problem.

Using DependencyWalker, I found that the NewtonWrapper plugin could not load because the following dlls were missing (for debug):

dContainers_d.dll
dCustomJoints_d.dll
newton_d.dll

After copying these from the NewtonDynamics project to the Demos/Assets/Plugins folder, the NewtonUnityPlugin Demos.sln, loaded into Unity, now works.

The longer term solution to this problem is to fix the post build steps in the visual studio solution to copy the right files, I noticed that the xcopy commands fails as well, trying to copy the file to the wrong folder. This is probably because I regenerate the visual studio solution from cmake into a build folder rather than use the old VS2015 project.

[svenberra]

Those dlls shouldn't be needed if Newton is compiled as a static lib as is done when using this solution... sdk\projects\visualStudio_2015_static_mt\build.sln. However you mentioned using cmake instead and that explains it.

[CharlesQHappy]

@xemjeff Have you "swig" the "newton.i" file to generate the wrap file for c++ and c# ? I stuck here, the wrap file is missing.

Do you know how does this happen?