How To Fix /PLMB/OSET009 - Object set &1 is in use by another user

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMB/OSET -

• Message number: 009

• Message text: Object set &1 is in use by another user

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMB/OSET009 - Object set &1 is in use by another user ?

  The SAP error message /PLMB/OSET009 Object set &1 is in use by another user typically occurs when a user attempts to modify or delete an object set that is currently being accessed or modified by another user. This is a common concurrency control mechanism in SAP to prevent data inconsistencies.
  Cause:
  
  Concurrent Access: Another user is currently using the object set, which locks it for modifications.
  Session Lock: The object set may be locked due to an open session or transaction that has not been completed or released.
  Long-running Transactions: If a transaction is taking a long time to complete, it may hold the lock on the object set longer than expected.
  
  Solution:
  
  Wait and Retry: If possible, wait for the other user to finish their work with the object set and then try again.
  Identify the Lock: Use transaction codes like SM12 (to view locks) or SM21 (to check system logs) to identify which user or session is holding the lock on the object set.
  Contact the User: If you can identify the user who is holding the lock, you may want to contact them to see if they can release the object set.
  Release the Lock: If necessary and if you have the appropriate authorizations, you can manually release the lock using transaction SM12. However, this should be done with caution, as it may lead to data inconsistencies if the other user is still working on the object set.
  Check for Background Jobs: Sometimes, background jobs may also hold locks. Check if there are any running jobs that might be using the object set.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related issues.
  SE11: To check the structure of the object set if needed.
  
  
  User Communication: Establish a protocol for users to communicate when they are working on shared object sets to minimize conflicts.
  Documentation: Ensure that users are aware of the implications of locking and how to properly release locks when they are done.
  
  If the issue persists or if you are unsure about taking any actions, it may be best to consult with your SAP Basis team or system administrator for further assistance.