No access permission as table is already locked

Question: Dear All

I am using BW 20B. when i want to activate the master data via
modeling --> infoobject --> choose respective info object -->right click context menu --> activate Master Data.

i am getting error message as follows

No access permission as table is already locked
Message no. RSAU 324

Diagnosis
The attempt to lock table M of characteristic ZMAT failed, as the table is already locked by another process. The process has request number MDDL_3P680A2LXO7FIKXMOBPNUSAVU.

Tables:

a) M : Master data table
b) T : Text table
Causes:

1. Another loading process is currently running, that has locked the table.
2. A previous loading process is canceled that has locked the same table. The lock was not deleted.


please give me solution that how to delete the lock and give me steps.
thanks in advance
_________________
Johnson Amalanathan
SAP BW Consultant
Wipro Technologies Ltd
Bangalore 560 001.
Phone : +91-80-51103070 ext 3154

Answer:
Use transaction SM12 with table name for all users.
If you are the only one locking the table and your sure that no process
is running you can delete the lock.
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