How To Fix AD021 - & & is locked by another transaction

AD021 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 021

• Message text: & & is locked by another transaction

What causes this issue?

The object you want to edit is already being edited by another user.

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 again later or use transaction SM12 to check whether you locked
the object yourself (earlier program abort when editing the same
object).
If you locked the object, you can use SM12 to remove the lock.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD021 - & & is locked by another transaction ?

  The SAP error message AD021 indicates that a particular object (such as a table, program, or transaction) is locked by another transaction. This typically occurs when multiple users or processes are trying to access or modify the same object simultaneously, leading to a conflict.
  
  Cause:
  
  Concurrent Access: Another user or process is currently using the object, which prevents your transaction from accessing it.
  Long-Running Transactions: A transaction that takes a long time to complete can hold locks longer than expected, causing other transactions to wait.
  Deadlocks: In some cases, two transactions may be waiting for each other to release locks, leading to a deadlock situation.
  System Configuration: Certain configurations or settings in the SAP system may lead to more frequent locking issues.
  
  
  Solution:
  
  Wait and Retry: Often, simply waiting for a few moments and then retrying the transaction can resolve the issue, as the lock may be released once the other transaction completes.
  Identify the Lock: Use transaction