Resetting the Write Lock
You can reset the Write lock when a sudden issue occurs while using MapEdit.
If a MapEdit session terminates abnormally (for example, due to
power failure) while a user has write access to the data, the map remains locked when
MapEdit is restarted. It must be reset if no one can obtain write
access. Only users with Map Administration security permissions can reset the write
lock.
Note: Using this option to enforce simultaneous write-access to the map from more
than one machine can yield serious damage to data.