SAP BASIS Transaction Code SM12



Transaction SM12

By this transaction we monitor the master data or transaction data that is locked exclusively for a particular SAP user id for performing modifications at that point of time. In such case, other users who try to access the same data set will be stopped by the Enqueue service giving information of the data being locked by the User id.
T-CODE SM12


Here in initial screen you can run for a particular user and client or with * we run for all

T-CODE SM12

In the picture it shows at that point of time in client 170, Users who had exclusively accessing data set in SAP for which others cannot modify. The related table and other information is provided also the time from when this is locked. If you double click a line then we get further details like in below picture.
A decision can also be made in case under certain circumstances it makes to delete the lock for the data set. Then we can do it using the icon Delete.


T-CODE SM12