I use ALM v11.5. In test plan, I have multiple test configurations under a test set resides in folder #1 . I want to move one specifc test configuration (not all) into other test set which resides in Folder#2.
Can someone pls help me to know to make this happen?
First you need to clarify if you are trying to move test instances in test sets in the Test Lab, or trying to move configuration associated to Tests (or just Tests themselves) in the Test Plan. You started out by saying "In the test plan...." but then said "...under a test set". Test Plan is a module containing the planned tests. Test Sets are an entity that is part of the Test Lab module.
In the Test Plan, you can move a test to another folder by dragging and dropping or cut/copy/paste.
There is no built in functionality to move tests in one Test Set to another in the Test Lab Module.
One way to do this would be to change data directly in the database. You would need to figure out the Test Set ID for the source and destination test sets. You would need to figure out the unique Test Instance ID for the test instance you want to move. Then, theoretically, you could modify the Test Set ID associated to the Test Instance ID directly in the table that links those two - TESTCYCL - and that would, theoretically "move" the test instance to the new test set.
If the test instance had been run at some point and had Run records associated to it, then each of those would also have to be found in the RUN table and the the Test Set ID in those records would also have to be updated.
I haven't actually executed this process, so I can't guarantee that it would actually work.