How To Fix LM_SEMAPHORE004 - Deletion of allow entries without semaphore entry failed (&1, ID &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: LM_SEMAPHORE - Messages for LM Sempahore Handling

• Message number: 004

• Message text: Deletion of allow entries without semaphore entry failed (&1, ID &2)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LM_SEMAPHORE004 - Deletion of allow entries without semaphore entry failed (&1, ID &2) ?

  The SAP error message LM_SEMAPHORE004 indicates that there was an attempt to delete allowed entries from a table or a data structure, but the operation failed because there was no corresponding semaphore entry. This error typically occurs in the context of managing locks or semaphores in SAP, which are used to control access to shared resources in a multi-user environment.
  Cause:
  The error can occur due to several reasons:
  
  Missing Semaphore Entry: The semaphore entry that is supposed to control access to the resource is missing or was not created properly.
  Concurrency Issues: There may be concurrent processes trying to access or modify the same resource, leading to conflicts.
  Database Integrity Issues: There might be inconsistencies in the database that prevent the deletion of entries.
  Program Logic Errors: The program logic may not be handling semaphore entries correctly, leading to attempts to delete entries without a valid semaphore.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Semaphore Entries: Verify if the semaphore entries exist in the relevant tables. You can use transaction codes like SE11 (Data Dictionary) to check the structure and contents of the relevant tables.
  
  
  Review Program Logic: If you have access to the ABAP code, review the logic that handles semaphore entries. Ensure that semaphore entries are created before any deletion attempts.
  
  
  Check for Concurrent Processes: Investigate if there are other processes that might be holding locks on the resource. You can use transaction SM12 to check for locks.
  
  
  Database Consistency Check: Run consistency checks on the database to ensure that there are no integrity issues. You can use transaction DB02 for database monitoring.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. There may be patches or updates that resolve known issues.
  
  
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including the context in which it occurs.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (to check locks), SM21 (to check system logs), and SE11 (to check table definitions).
  SAP Notes: Regularly check for updates and notes related to your SAP version, as they may contain fixes or workarounds for known issues.
  Documentation: Review SAP documentation related to semaphore management and locking mechanisms to better understand how they work and how to troubleshoot related issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.