When a shared block RAM memory is used between processors, BMM parsing will fail when the same LOC constraint is used in the two instances of the shared memory in each processor's memory map.
This problem has been fixed in the latest 8.2i Service Pack available at:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is 8.2i Service Pack 3.