In the Administrator Tool, right-click on a project and selected "Properties". When changing to the display order of the states, and/or the access lists for the project and then saving these changes you may see this error message:
"E03020064: The package named <package> is being used by <process> . Client: <client computer and pid> Server: <server computer and pid>”
What is causing these errors?
Harvest Software Change Manager v12.5 and higher
Any changes to a project when a user is performing a check in or check out inside that project will produce this error message.
To avoid this error, schedule changes to your project for times when no other users – or at least fewer users – are on the system to prevent or minimize the possibility of a conflict.