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3.1i Virtex-II PAR - "FATAL_ERROR:Route:basrtsanity..." occurs on floorplanned design immediately after placement.
Keywords: basrtsanity, 284, floorplanned
Cases have been seen where PAR fails with the following error immediately after placement, but before any routing messages are posted:
FATAL_ERROR:Route:basrtsanity.c:284:126.96.36.199 - Process will terminate. To resolve this error, please consult the Answers Database and other online resources at http://support.xilinx.com
NOTE: This Answer record only addresses your issue if it involves a Virtex-II design and the failure occurs before any routing messages are posted.