Critical Warning: Synopsys Design Constraints File file not found: 'mux41.sdc'. A Synopsys Design Constraints File is required by the TimeQuest Timing Analyzer to get proper timing constraints. Without it, the Compiler will not properly optimize the design.
Warning: No clocks defined in design.
Warning: No clocks defined in design.
Warning: No clocks defined in design.

怎么安装？你用的什么版本？

解决了吗，我也是遇到这个问题，一模一样