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AR# 22997

SW-8.1i Spartan-3E PAR - "WARNING:Route:447 - CLK Net:XYZ may have excessive skew because ### CLK pins failed to route using a CLK template."

Description


PAR successfully routed my design, but the PAR report file (.par) contains warning messages about clock skew. What is the problem?



"WARNING:Route:447 - CLK Net:XYZ may have excessive skew because

### CLK pins failed to route using a CLK template."

Solution

In some cases prior to ISE revision 9.1i, this clock skew warning was issued as a false warning. You can safely ignore the warning message if the Clock Report in the .par file does not report any skew problems for the clock net listed in the message.

AR# 22997
Date Created 09/04/2007
Last Updated 06/06/2011
Status Archive
Type General Article