General Description:
BitGen errors out with "DesignRules:462 - Chipcheck : Incompatible IO standard..." while the two reported IO standards are exactly the same.
"ERROR:DesignRules:462 - Chipcheck: Incompatible IO standards. IO standard
LVCMOS12 of comp sw1 and IO standard LVCMOS12 of comp sw6 are incompatible.
They cannot be in the same IO bank.
ERROR:DesignRules:462 - Chipcheck: Incompatible IO standards. IO standard
LVCMOS12 of comp sw1 and IO standard LVCMOS12 of comp sw7 are incompatible.
They cannot be in the same IO bank."
This problem has been fixed in the latest 6.3i Service Pack available at:
http://support.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is 6.3i Service Pack 3.