How To Fix UMM_CUSTDATA011 - Wall '&1' or one of its subobjects is locked by &2

SAP Error Message - Details

• Message type: E = Error

• Message class: UMM_CUSTDATA - Message Texts from Database Interface of MC Customizing

• Message number: 011

• Message text: Wall '&1' or one of its subobjects is locked by &2

What causes this issue?

You have attempted to open wall "&V1&". This object (or one of its
subobjects) is currently being processed by user "&V2&" and is,
therefore locked for other users.

System Response

The object remains locked exclusively for user "&V2&" until this user
finishes processing.

How to fix this error?

Try to open the wall later or contact the current user "&V2&".

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.