"Internal ID" error message when opening drawing

When I try and open up a 2D drawing either from disc or directly from the model that is open I get the error message that reads "the internal ID of the model that is already open does not match".  If I accept anyways, the dwg does open but it "blows up".  If I do not accept then the dwg opens but all views are blank.

Can anybody relate to this or has had it happen to them?

Thanks!

SolidworksDrawings And Detailing