General Description: When I attempt a verify operation on a programmed Spartan-II device with 4.1i iMPACT, the following error messages occur:
"'1': Verifying device... ERROR:Bitstream:98 - There are 257 differences. ERROR:iMPACT:395 - The number of difference is 257 '1': Verification terminated. done. '1': Programming terminated due to Errors. PROGRESS_END - End Operation. Elapsed time = 21 sec."
The verify operation is not supported by 4.1i iMPACT for all Spartan-II ES (engineering samples) devices and some Spartan-II production devices. The Spartan-II Production devices that do not support Verify are those with manufacturing codes beginning with "AFP" (UMC fab, .25u process).