I have set the viewers in PDM to enable us to view all of our file type. Works perfectly in the preview tab and when you select to open any file.

Our only problem is when we view the history of a DWG file and select an older version and try and view it, we get the error

Error executing viewer:

(%Program Files%\Dassult Systems\Draftsight\bin\Draftsight.exe

C:\Users\user\AppData\Local\Temp\FileViewerExe0Ver_2_7 "Filename.deg")

The specified file was not found