How To Fix CPWB813 - Change master record is displayed in new session

SAP Error Message - Details

• Message type: E = Error

• Message class: CPWB - General Workbench Messages

• Message number: 813

• Message text: Change master record is displayed in new session

What causes this issue?

You would like more detailed information on the change master record
for a change number.

System Response

The system opens a new session (a new window) to display the data in
the change master record.

How to fix this error?

After you have checked the data in the change master record you can
close the new session by choosing <zh>Back</>. At any time you can
continue working in the previous session (without first having to close
the new one).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CPWB813 - Change master record is displayed in new session ?

  The SAP error message CPWB813, which states "Change master record is displayed in new session," typically occurs when you attempt to change a master record (such as a material master, vendor master, etc.) while another session is already open for that same record. This is a common issue in SAP when multiple users or sessions are trying to access or modify the same data simultaneously.
  Cause:
  
  Concurrent Access: The primary cause of this error is that the master record you are trying to change is already being accessed in another session. SAP locks the record to prevent data inconsistencies.
  Session Management: If you have multiple sessions open in SAP and you try to edit the same record in a different session, you may encounter this error.
  
  Solution:
  
  Close Other Sessions: Check if you have another session open that is currently displaying or editing the same master record. If so, close that session or navigate away from the record.
  Use the Same Session: If you need to make changes, do so in the session where the record is already open. This will help avoid the error.
  Wait for Lock Release: If another user is editing the record, you may need to wait until they finish and the lock is released.
  Check for Background Jobs: Sometimes, background jobs or processes may also lock records. Ensure that no background jobs are running that might be accessing the same record.
  Transaction Codes: Make sure you are using the correct transaction codes for editing the master record. For example, use MM02 for material master changes, XD02 for customer master changes, etc.
  
  Related Information:
  
  SAP Lock Mechanism: SAP uses a locking mechanism to ensure data integrity. When a record is being edited, it is locked to prevent other users from making changes until the first user has completed their task.
  Transaction Codes: Familiarize yourself with the relevant transaction codes for the type of master record you are working with.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes provided by SAP.
  User Training: Ensure that users are trained on how to manage sessions and understand the implications of concurrent access to master records.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or support for further assistance.