My design fails in Phase 7.8 of PAR with the following error:
"FATAL_ERROR:Place:PlXil_Uapflow1.c:1790:126.96.36.199 - FATAL ERROR DURING FAST FEEDBACK FITTING."
This is a software bug with no work-around.
Why is this occurring?
This problem has been fixed in the latest 8.1i Service Pack available at:
The first service pack containing the fix is 8.1i Service Pack 3.