How To Fix PPC1PR020 - Backflush processing is currently locked by &

SAP Error Message - Details

• Message type: E = Error

• Message class: PPC1PR - Abarbeitung der ERP-Prozesse

• Message number: 020

• Message text: Backflush processing is currently locked by &

What causes this issue?

The backflush processing is currently blocked. This is either because
backflushes are currently being received or processed or because
another user has started processing the backflushes.

System Response

Only one person can start processing the backflushes at any one time.

How to fix this error?

Wait until the other user has finished.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPC1PR020 - Backflush processing is currently locked by & ?

  The SAP error message PPC1PR020 indicates that backflush processing is currently locked by another user or process. This typically occurs in the context of production orders or material movements where backflush is being attempted, but the system has detected that another transaction is currently using the same resources.
  Cause:
  
  Concurrent Access: Another user or process is currently performing backflush processing on the same production order or material.
  System Lock: The system may have a lock due to a previous transaction that has not yet been completed or released.
  Long-running Transactions: If a transaction takes too long to complete, it can hold locks longer than expected, preventing other processes from accessing the same data.
  
  Solution:
  
  Wait and Retry: If the lock is temporary, waiting for a few moments and then retrying the backflush operation may resolve the issue.
  Identify the Locking User/Process:
  
  Use transaction SM12 to check for locks. You can filter by the user or the object that is locked.
  If you identify the user or process that is holding the lock, you can communicate with them to understand if they can release the lock.
  
  
  Release Locks: If necessary and if you have the appropriate authorizations, you can manually delete the lock entries in SM12. However, this should be done with caution, as it may disrupt the other user's work.
  Check for Long-running Jobs: Use transaction SM37 to check for any long-running jobs that might be causing the lock. If you find any, you may need to investigate or terminate them if appropriate.
  System Configuration: If this issue occurs frequently, it may be worth reviewing the system configuration and performance to ensure that it can handle concurrent processing effectively.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM37: To monitor background jobs.
  SM21: To check system logs for any related errors or warnings.
  
  
  Documentation: Refer to SAP Help documentation for more details on backflush processing and locking mechanisms.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide patches related to this error.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.