General Description: When 4.1i PAR is run, the following error is reported:
"FATAL_ERROR:Utilities:basagconjgradient.c:102:1.4 - CG SOLVER: residual after solving > residual before solving. Process will terminate. To resolve this error, please consult the Answers Database at http://support.xilinx.com"
Version 4.1i software does not officially support Solaris version 5.6 (although it may work with a set of OS patches). The fatal error above does not reproduce when PAR is run with a supported version of Solaris.
So, to avoid this error, run the design on a Solaris 5.8 machine.