Keyword: crash, prohibit
When I try to prohibit a second pad or IOB location, Floorplan Editor crashes Project Navigator. When will this be fixed?
This problem has been fixed in the latest 9.1i Service Pack available at:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is 9.1i Service Pack 2.