How To Fix OM535 - Nonexclusive lock is irreversible

SAP Error Message - Details

• Message type: E = Error

• Message class: OM - Customizing Materialwirtschaft

• Message number: 535

• Message text: Nonexclusive lock is irreversible

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message OM535 - Nonexclusive lock is irreversible ?

  The SAP error message OM535 "Nonexclusive lock is irreversible" typically occurs when there is an attempt to modify or delete a resource that is currently locked by another user or process in a way that does not allow for shared access. This can happen in various scenarios, such as when working with materials, production orders, or other transactional data.
  Cause:
  
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. When a user or process locks a record in a non-exclusive manner, it means that other users cannot modify or delete that record until the lock is released.
  Long-Running Transactions: If a transaction takes too long to complete, it may hold onto locks longer than necessary, causing other users to encounter this error.
  Deadlocks: In some cases, deadlocks can occur where two processes are waiting for each other to release locks, leading to this error.
  System Configuration: Certain configurations or customizations in the SAP system may lead to unexpected locking behavior.
  
  Solution:
  
  Identify the Lock: Use transaction code SM12 to check for active locks. You can see which user or process is holding the lock and what object is locked.
  Release the Lock: If you have the necessary authorizations, you can manually delete the lock entry in SM12. However, be cautious with this approach, as it may lead to data inconsistencies if the other process is still active.
  Communicate with Users: If the lock is held by another user, communicate with them to understand why the lock is in place and if they can release it.
  Optimize Transactions: Review and optimize long-running transactions to ensure they complete quickly and release locks in a timely manner.
  Check for Deadlocks: If you suspect a deadlock, analyze the processes involved and resolve the deadlock situation by terminating one of the processes if necessary.
  System Configuration Review: If this error occurs frequently, consider reviewing the system configuration and locking strategy to ensure it aligns with business processes.
  
  Related Information:
  
  Transaction Codes: 
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related issues.
  ST22: To check for dumps that may provide additional context.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking mechanisms.
  Performance Monitoring: Use transaction codes like ST03N or ST04 to monitor system performance and identify any bottlenecks that may be causing long locks.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.