I cant see the toolpath verification when i finish a milling operation in surfcam 6 and it shows this message: Unable to open INC stream!
Tool bar at top of screen has an icon that looks like a end mill with colored tip. This will open tool path screen. Press play button.
Make sure you have saved the file before running tool path verification.
You are probably using the DEMO \ EDUCATIONAL version, as it is unable to Verify or Backplot. If you have a FULL license, try Regenerate with Original Geometry then Verify or Backplot the file.