Hi Jim,
We faced similar challenges during our 8.0 M050 to 9.1 M020 upgrade. The way we handled this was to communicate with the user letting them know that there is a possibility that they will lose their data should they not check them in before the upgrade. We also ran the script in the check mode periodically, that identified all users who have objects in the workspaces and emailed those users on a regular basis. We gave them until 5PM to the day of the upgrade to have all items in their workspaces checked, other they will be deleted. This workout quite well. Unfortunately there is no other way to ensure this other than communication with your user community and making them aware of the consequences of not checking in data in their workspace.
HTH,
Alexius C. Chukwuka
IT Analyst, PDP Systems
John Deere Power Systems
Product Engineering Center
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