Sorry BlackBox,
The correct alert is that:
Autodesk DWG. This file is a TrustedDWG last saved by an Autodesk application
or Autodesk licensed application.
Command: _RIBBON
Workspace "_RIBBON" does not exist.
Enter name of workspace to make current [?] <DEAP>: C*Cancel*
Enter workspace option [setCurrent/SAveas/Edit/Rename/Delete/SEttings/?]
<setCurrent>: OMMANDLINE
Invalid option keyword.
Enter workspace option [setCurrent/SAveas/Edit/Rename/Delete/SEttings/?]
<setCurrent>:
Enter name of workspace to make current [?] <DEAP>: