I get the message in the subject, "this sketch contains dimensions or relations to model geometry which no longer exists" when I open a particular drawing.  The What's Wrong box shows two Warnings, both for Feature Sketch7.  The drawing is two sheets.  First sheet has two parts.  Second sheet has one assembly and one part.  The assembly contains two parts.

I don't get the error when I open the parts or the assembly, only the drawing.  If there's something wrong in the drawing, why am I not seeing some colored dimension or centerline or something?  Everything looks fine.  Everything's black.  If I highlight something, the relations are all green. thought since it was the same error twice, it might be something in the title block, but I did the Edit Sheet and looked at everything in the title blocks and they look fine, too.

Does anyone have an idea how I can find the errors?  Thanks.

Bill