Hello Jose,
This problem seems to appear sometimes in Solution Manager 7.1 since the system doesn't finish with the login session correctly. Because of that, when you try to modify a component or continue with a system setup the system shows that message.
As Deepak said please check if there is any active session in SM12 that could be causing this problem. It's really important you check that the user is not a SolMan user as SM_SID, SM_EFWK, etc.
Best regards.