I have updated my .SDC file and .v file,and now the warning does not exit, but when I do the in place optimization, a prompt warning in error application window as this:
Timing graph must be built before running "isTimingMet"
so I can not use IPO to fix setup time violation correctly. how can I solve it, need for your advice.
Added after 2 minutes:
ow,there are also a few warning in the terminal I have omited,
--> WARNING: Pin 'core/DOUT_regR8R/D' is driven 'ZERO' and 'X' simultaneously,
--> WARNING: Pin 'core/DOUT_regR23R/D' is driven 'ZERO' and 'X' simultaneously,
preserving 'X.' <TA-549>.
--> WARNING: Pin 'core/DOUT_regR24R/D' is driven 'ZERO' and 'X' simultaneously,
preserving 'X.' <TA-549>.