Serious error: adskassetapi_new-5_2.dll does not exist

By Adam Nagy

After installing Inventor 2015 and running your program that uses apprentice to access e.g. the ActiveRenderStyle property of the document, you might get this message: "Serious error" / "Library C:\Program Files\Autodesk\Inventor 2015\Bin\bin32\adskassetapi_new-5_2.dll does not exist"

This problem only seems to occur after installing Inventor 2015 if:
– you are trying to use apprentice from a 32 bit process on a 64 bit OS, and
– the document you have opened in apprentice has not been migrated to 2015 yet: i.e. ApprenticeServerDocument.NeedsMigrating = True, and
– you are calling functions which are affected by the issue, or you are using the viewer component

If you have only Inventor View 2015 installed, that should be working fine.

It seems that the issue is caused by not having 2 of the 32 bit dll's installed in the appropriate folder:
libeay32_Ad_1.dll and ssleay32_Ad_1.dll – attached here:  Download Modules_x32

If you place the two 32 bit dlls inside the C:\Program Files\Autodesk\Inventor 2015\Bin\Bin32 folder then this should solve the problem.