Merging data base with two RTL changes

Hi team,

Do we have any provision to merge two different version of coverage .icc files?

Example. I have generated coverage data base D1 with RTL changeset CL1. There are some changes done in RTL so coverage data base D2 regerated on RTL changeset CL2 . Does IMC provides any provision to merge D1 and D2? 

I have tried running imc in batch mode with merge command but it is giving error.

IMC version : cadence/MDV1710

Thanks

Sushant