How To Fix /PLMI/PPEENG158 - &1 &2 not unlocked; dependent locks still exist

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMI/PPEENG -

• Message number: 158

• Message text: &1 &2 not unlocked; dependent locks still exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMI/PPEENG158 - &1 &2 not unlocked; dependent locks still exist ?

  The SAP error message /PLMI/PPEENG158 &1 &2 not unlocked; dependent locks still exist typically occurs in the context of the SAP Production Planning and Control (PP) module, particularly when dealing with planning objects such as production orders, purchase orders, or other related entities. This error indicates that an attempt was made to unlock a specific object (e.g., a production order) but the unlock operation could not be completed because there are still dependent locks on related objects.
  Cause:
  
  
  Dependent Locks: The primary cause of this error is that there are other objects that are still locked and are dependent on the object you are trying to unlock. For example, if you are trying to unlock a production order, there may be dependent locks on related components, such as operations, materials, or other linked orders.
  
  
  Transaction Interruption: If a transaction that was modifying or processing the object was interrupted (e.g., due to a system crash or user cancellation), it may leave locks in place.
  
  
  Concurrency Issues: Multiple users or processes trying to access or modify the same object can lead to locks being held longer than necessary.
  
  
  Solution:
  
  
  Identify Dependent Locks: Use transaction codes like SM12 (to view and manage locks) to identify which objects are still locked. Look for locks that are related to the object you are trying to unlock.
  
  
  Release Locks: If you have the necessary authorizations, you can manually release the locks on the dependent objects. Be cautious when doing this, as it may affect other users or processes.
  
  
  Check for Active Sessions: Ensure that there are no active sessions or transactions that are still using the object. If necessary, communicate with users who may be holding locks.
  
  
  Wait for Automatic Release: In some cases, locks may be released automatically after a certain period. If the dependent locks are held by a background job or a long-running transaction, you may need to wait for it to complete.
  
  
  Review Custom Code: If the issue persists, review any custom code or enhancements that may be affecting the locking mechanism. There may be logic that is not properly releasing locks.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (lock entries), SM21 (system log), and ST22 (dump analysis) for troubleshooting.
  SAP Documentation: Review SAP documentation related to locking mechanisms in the PP module for a deeper understanding of how locks are managed.
  User Authorizations: Ensure that users have the appropriate authorizations to unlock objects and manage locks.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.