With tape library sharing enabled on a System Center Data Protection Manager 2007 server, you may find that you're unable to generate the "Tape Management" and "Tape Utilization" reports even though the other reports seem to generate just fine. When generating the tape-based reports fail, the following error message is displayed in the Internet Explorer window:
Cause: The reports themselves are incorrectly configured in the report builder.
DPM 2007 Tape reports fail to generate with error: "The operation has timed out. The report server has canceled the operation"