How To Fix /SAPAPO/ATP102 - Plng object &1 and basic method &2 have been locked (check not possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 102

• Message text: Plng object &1 and basic method &2 have been locked (check not possible)

Self-Explanatory Message

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• What is the cause and solution for SAP error message /SAPAPO/ATP102 - Plng object &1 and basic method &2 have been locked (check not possible) ?

  The SAP error message /SAPAPO/ATP102 indicates that a planning object and a basic method are locked, which prevents the system from performing the necessary checks for Available-to-Promise (ATP) calculations. This error typically occurs in the context of Advanced Planning and Optimization (APO) in SAP.
  Cause:
  
  Locking Mechanism: The error is primarily caused by the locking mechanism in SAP. When a planning object (like a product or location) is being processed or modified by another user or process, it gets locked to prevent data inconsistencies. If another user tries to access the same object, they will encounter this error.
  Long-running Processes: If a long-running transaction or background job is holding the lock, it can lead to this error for other users trying to access the same planning object.
  System Configuration: Incorrect configuration of the planning object or basic method can also lead to locking issues.
  
  Solution:
  
  Identify the Lock: Use transaction code SM12 to check for locks on the planning object. You can filter by user or object type to find the specific lock.
  Release the Lock: If you identify a lock that is no longer needed (e.g., a user has left the session open), you can manually delete the lock entry from SM12. However, be cautious when doing this, as it may lead to data inconsistencies if the lock is still needed.
  Check Background Jobs: If a background job is holding the lock, you may need to wait for it to complete or, if necessary, terminate the job using transaction SM37.
  Review Configuration: Ensure that the configuration for the planning object and basic method is correct. This may involve checking settings in the APO system or consulting with your SAP Basis or APO configuration team.
  Retry the Operation: After resolving the lock, retry the operation that caused the error.
  
  Related Information:
  
  Transaction Codes: 
  
  SM12: To view and manage lock entries.
  SM37: To monitor and manage background jobs.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  Documentation: Review SAP documentation on ATP and APO to understand the implications of locks and how to manage them effectively.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or reach out to SAP support for further assistance.