I have the following line in my UCF file:
TIMESPEC TSa = FROM "CLK2" THRU "group1" TO "CLK" 10 ns;
Which leads to the following error being reported:
ERROR:TSDatabase:21 - Processing TIMESPEC definition "TSa=FROM "CLK2" THRU "group1" TO "CLK" 10000.000000 pS" from UCF file: No TPTHRU group named "group1" is defined.
Please ensure you have defined a TRTHRU group, and it includes at least 1 element. Also please ensure you have used the correct group name, which is case sensitive.