In reply to S.P.Rajkumar.V:
Questa 6.6d should compile the UVM register package with the OVM. There was just an example that didn’t work that needed 6.6e.
This error is very strange because ‘ovm_sequence’ is not recognized, but it is not the first OVM class to be used by the register package. Can you compile a simple OVM example using 2.1.2 that has an ovm_sequence? Are you able to get Questa 6.6e? BTW, Questa 10.0c comes with both packages pre-compiled.
If you cannot resolve your problems with these suggestions, you should contact Mentor support directly.