When I run "Generate Target PROM/ACE File," I see the following error message:
"ERROR:Bitstream:99 - Prom size <size> is greater than the maximum size of 1048576K"
To work around this issue, you can delete the iMPACT project file (*.ipf) and rerun through the PROM File Formatter wizard, or you can run iMPACT standalone.
This issue will be resolved in the ISE Service Pack 10.1i SP1.