After I run Timing Analysis on the design with FROM:TO, I receive a hold violation. I did not receive a hold violation in 9.2isp4.
The issue is that the FROM:TO is ending at a clock pin of a flip-flop, which does not have a hold requirement.
To work around this problem, remove the flip-flop that is causing the hold violation.
This problem has been fixed in the latest 10.1 Service Pack available at:
The first service pack containing the fix is 10.1 Service Pack 1.