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After having recently moved to Creo 4.0 M060 (about 1-2 months ago) from WF5.0, some (but not all) drawings of instances will open up and not have all of the model visible. If you close the drawing and then open up the generic model (mostly if not always assemblies) and then open up the drawing, everything is fine. Does any know what may be causing this behavior?
It seems that one it has been saved in Creo 4.0, that it does not re-occur, but this has yet to be verified.
I would venture to guess that your family tables will need to be regenerated and verified in Creo4 and then this issue will go away.
There were changes made in Creo that require FT files be verified before saving that was not the case in WF.