If a system failure occurs while objects are locked, you must manually release the object locks.
To release all locked objects
The names of the users responsible for the locks appear under User Name. The number of objects locked by each user appears under Number of Objects Locked.
If you do not have superuser privileges, you can remove only the locks that you have set. AutoCAD Map 3D toolset removes the objects from the save set.
If you have superuser privileges, you can select a user name and remove all the locks set by that user.