The "partition delete" command should not be allowed on partitions that are on EDIF design units, as these partitions should only be created and deleted in the third-party synthesis tool.
The "partition delete" Tcl command has been fixed to correctly reflect this limitation in the message returned in this situation.
This problem has been fixed in the latest 9.1i Service Pack available at:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jspThe first service pack containing the fix is 9.1i Service Pack 3.