VS12 project upgrade from CUDA 4.2 to CUDA 6.0 causing errors

Looking for some help with this issue…

I have a solution in visual studio 2012 that previously compiled and ran without issue with build customization CUDA 4.2. When I switched the build CUDA 6.0 (making sure to update my lib and include files), it compiled fine, however the code now crashes with an “unknown error”

cuda-memcheck produces this error:

Program hit error 999 on CUDA API call to cuModuleUnload
========= Saved host backtrace up to driver entry point at error
========= Host Frame:C:\Windows\system32\nvcuda.dll (cuModuleUnload + 0x11e)
[0x3dfe]

This is my first time changing CUDA targets on a project, am I simply forgetting/missing something or is this issue more complex?