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Hi Everyone, I would really appreciate if somebody please help me resolving the problem I have using PSS/E version 33. I am trying to solve the base case but it gives me an error that X number of buses in island without a swing bus--use activity tree. I guess islands refer to type 4 buses. Correct me if I am wrong? Which are not connected to anything. Should I remove those buses from the case (need expert opinion)? If I should then could someone please write a python code to remove those islands and solve the case.

That will be a great help.