How To Fix CUIB1021 - Instance &1 is locked

CUIB1021 - Overview

• Message type: E = Error

• Message class: CUIB1 -

• Message number: 021

• Message text: Instance &1 is locked

What causes this issue?

The instance <(>&<)>v1& is currently locked by another process that
updates the instance.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Try making the changes again at a later point in time.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CUIB1021 - Instance &1 is locked ?

  The SAP error message CUIB1021, which states "Instance &1 is locked," typically occurs when a specific instance (such as a user session, a background job, or a particular resource) is locked and cannot be accessed or modified. This can happen for various reasons, including:
  Causes:
  
  User Lock: A user may have an active session that is locking the instance.
  Background Jobs: A background job may be running and holding a lock on the instance.
  Transaction Errors: An error in a transaction may have left the instance in a locked state.
  Database Locks: Locks at the database level can also lead to this error.
  System Maintenance: System maintenance activities or updates may temporarily lock instances.
  
  Solutions:
  
  
  Identify the Lock:
  
  Use transaction SM12 to check for locks. You can see which user or process is holding the lock.
  Look for the instance number mentioned in the error message.
  
  
  
  Release the Lock:
  
  If you have the necessary authorizations, you can manually delete the lock entries