If I use the power reduction option for MAP targeting a Spartan-6 device,an error similar to the following appears inMAP Message in the Project Navigator:
"Power:1583 output IO named "{IO name}" has invalid Bank assignment"
A similar message also occurs with Virtex-6 and Virtex-5 devices, but with the following error codes:
Power:1542
Power:1530
Power:1582
These messages come from Xpower and are incorrect; they can be safely ignored.
There are no plans to fix this issue.