Autodesk Inventor Professional 2014: VBA failed to initialize. Please restart Inventor.

If you receive such an error message from Autodesk Inventor Professional 2014, you might need to reinstall the VBA 7 modules. See for more details.

The short story is to shut down Inventor and reinstall the VBA 7 modules using either 3rdParty\x64\VBA\Vba7.MSI or 3rdParty\x86\VBA\Vba7.MSI from the installation media or from C:\Autodesk.