A tool could be written that searches all WS and returns all objects that are in more than one WS along with the WS that the objects are in.
Duplicate could be defined as:
same number and revision
same number revision and iteration.
I improved my earlier post a bit.
I passed the output of the code I ran to a Report.
This makes it easy for everyone to access.
Here's the output when run from a Windchill Shell
The report's input Username defaults to the current user but is editable.
Here's the output when displayed in a Report.
Displays all EPMDocuments that are in more than one of the user's WS along with the WS name.