This article refers to Software downloads for discontinued products

If C-Pen software crashes due to "Unexpected error" or "Object reference not set to an instance of an object" it most likely depend on lack of/wrong versions of one or more of the three 3 Windows dependencies the software rely on. These three dependencies are C++ Redistributables 2005, 2008, and 2010.

To resolve the problem, it´s recommended to manually download and install all three. 

Download url's to Windows dependencies: C-PEN redists

The zip file contains three redists:

  • 2005vcredist_x86.exe
  • 2008vcredist_x86.exe
  • 2010vcredist_x86.exe

If installation of the redistributables fails or C-Pen Core consistently crashes with same error message, try to enable installation logging and retrieve and send the installation log file to

Check here for instructions:

Having C-Pen Core version 3.9.2 and later?
Read here --> Exception error