Solution or Workaround
This error occurs while digitizing coordinates:
COM ERROR 8
This is a framing error, most likely due to differences between the configuration of the digitizer's serial port and settings in the difgorm file.
Check the digitizer settings and the CON-DIG settings to make sure they are the same as per configuration notes for your digitizer.
This error is common with the Calcomp DrawingBoard III as it alters the default configuration settings.