Hi Kashif,
You have copied the datafiles from QA to test whereas the test system database at 10.2.0.5 release. Then, upgraded to 11.2.0.2 successfully, correct?
If it is, check the usertrace folder the for the trace file and upload here. You can find the usertrace folder by using the statement, below;
SQL> show parameter user_dump_dest
Best regards,
Orkun Gedik