Finding 0 coverage in TOP registers on firing regression

Hi All

I have been firing two different regressions(A & B) to check RAL coverage. On merging them i could see good amount of coverage number for both top_registers and instances registers but on checking COVERAGE for one single regressions (A) i’m finding the top_registers coverage to be 0% but could see coverage on loading for other regression(B). Both the regressions contain all the testcases equally but could not figure out the solution.

I hope i Can get the answer here

Thank you

In reply to Swetha_ch:

This is far too little information to be able to help you. And emerging coverage data from regression is likely to be very tool specific. This Mentor/Siemens EDA sponsored public forum is not for discussing tool specific usage or issues. Please read your tool’s user manual or contact your tool vendor directly for support.