How To Fix /SAPAPO/PDEM423 - Realignment has not finished; running of this service is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/PDEM -

• Message number: 423

• Message text: Realignment has not finished; running of this service is not allowed

Self-Explanatory Message

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• What is the cause and solution for SAP error message /SAPAPO/PDEM423 - Realignment has not finished; running of this service is not allowed ?

  The SAP error message /SAPAPO/PDEM423 Realignment has not finished; running of this service is not allowed typically occurs in the context of SAP Advanced Planning and Optimization (APO) when a realignment process is still ongoing or has not been completed successfully. This error can prevent users from executing certain services or functions that depend on the completion of the realignment process.
  Cause:
  
  Ongoing Realignment Process: The most common cause of this error is that a realignment process is currently running or has not been completed. Realignment is a process that adjusts the planning data in the system to ensure consistency and accuracy.
  Previous Errors: If the realignment process encountered an error or was interrupted, it may leave the system in a state where it thinks the process is still active.
  Locking Mechanism: SAP uses locking mechanisms to prevent multiple processes from running simultaneously on the same data. If a realignment is in progress, it will lock the relevant data, leading to this error for other processes.
  
  Solution:
  
  
  Check Realignment Status: 
  
  Use transaction codes like /SAPAPO/PDEM or /SAPAPO/SDP94 to check the status of the realignment process. Look for any ongoing processes that may be causing the lock.
  
  
  
  Wait for Completion: If a realignment process is running, you may need to wait for it to complete. You can monitor the process in the background jobs (transaction SM37).
  
  
  Terminate Stuck Processes: If you find that the realignment process is stuck or has failed:
  
  You can terminate the job using transaction SM37 if you have the necessary authorizations. Be cautious with this step, as terminating a job can lead to data inconsistencies.
  
  
  
  Check for Errors: Review the logs for any errors that may have occurred during the realignment process. This can provide insights into what went wrong and how to address it.
  
  
  Restart Realignment: If the realignment process was interrupted, you may need to restart it. This can often be done through the APO planning book or relevant transaction.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/PDEM, SM37, and SM21 (for system logs).
  SAP Documentation: Review SAP documentation related to APO realignment processes for a deeper understanding of how they work and best practices for managing them.
  System Performance: Sometimes, performance issues can lead to long-running processes. Ensure that your system is adequately resourced and optimized for the tasks it is performing.
  
  If the issue persists after following these steps, it may be necessary to involve your SAP Basis team or SAP support for further assistance.