Regarding the merge of coverage Databases, proper procedure to merge DBs for the same test

In reply to aarelovich:

The question you referred to gives you the solution you are looking for. You need to set the UCDB attribute TESTNAME to a unique value for each run. Perhaps UVM_TESTNAME_PARM1_PARM2…

Although be advised that if your parameters change anything DUT related, you will have merge issues.