SOI Event Policy locked

Document ID : KB000124626
Last Modified Date : 16/01/2019
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Issue:
I was in the process of making a change to an existing Deployed Event Policy when I selected Edit Policy the window froze. I waited 10 minutes then closed the window, then closed the SOI console. When I reopened it and select EDit Policy again I get a pop up window that specifies. 'Cannot obtain exclusive lock required to change Event policy. The resource is already locked by user.' 
Environment:
SOI 4.0
SOI 4.2
Cause:
Program was closed before it could release the lock.
Resolution:
Login to UI Debug page
http://<UI_Host>/sam/debug
Go to Model Lock
In the Action column, click on Remove for entry EVENT_MGMT_EDITOR