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Altera_Forum's avatar
Altera_Forum
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16 years ago

Critical Warning: Synopsys Design Constraints File file not found

Hello, I’m using quartus for synthesis and place &route. I’m getting the following critical warning: " Critical Warning: Synopsys Design Constraints File file not found: 'smtif.sdc'. A Synop...
Altera_Forum's avatar
Altera_Forum
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12 years ago

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So how to deal with it? how to add timing constraints? how to decide how many timing constraints should I add?

Thank you very much!

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I just had the same problem and had been trying to fix it for 2 days, finally done. If you are using Qsys or MegaFunction in your design, the Quartus seems to be very stupid, it will not automatically find the .sdc file by itself, to add them into your design, you have to select Assignment->TimeQuest Analyzer, then in the category find the TimeQuest Analyzer, add the .sdc files generated by Quratus for the IP cores, usually they are located in ../db/ip/submodules/.