Timing Not Being Constrained?

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OK, I tried to post as little as possible since I didn't want it to get too complicated. The clock grouping goes;

set_clock_groups -asynchronous -group {real_clock}

set_clock_groups -asynchronous -group {real_clocka}

set_clock_groups -asynchronous -group {real_clockb}

There's no reference to the virtual clock in my grouping. What you're saying is perhaps that's the problem?

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Peruse the timing report and it will tell you what clock is being used to compute the clock to output delay. That is the clock you need to use for your constraint as well.

Kevin Jennings