How To Fix /SAPAPO/TSM596 - Locking conflicts happened

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TSM -

• Message number: 596

• Message text: Locking conflicts happened

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 /SAPAPO/TSM596 - Locking conflicts happened ?

  The SAP error message /SAPAPO/TSM596 Locking conflicts happened typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there are issues related to data locking during planning activities. This error indicates that a process is trying to access data that is currently locked by another process, leading to a conflict.
  Causes:
  
  Concurrent Access: Multiple users or processes are trying to access or modify the same data simultaneously.
  Long-Running Transactions: A transaction that takes a long time to complete may hold locks longer than expected, causing conflicts with other transactions.
  System Performance Issues: If the system is slow, it may lead to longer lock durations, increasing the chances of conflicts.
  Configuration Issues: Incorrect configuration of the locking mechanism in APO can lead to unexpected locking behavior.
  
  Solutions:
  
  
  Identify Locking Processes:
  
  Use transaction code SM12 to check for active locks in the system. This will help you identify which user or process is holding the lock.
  If necessary, you can manually delete the lock entries, but this should be done with caution and typically only by an administrator.
  
  
  
  Review and Optimize Processes:
  
  Analyze the processes that are causing locking conflicts. If certain transactions are frequently causing issues, consider optimizing them or scheduling them during off-peak hours.
  Ensure that long-running transactions are optimized to reduce their execution time.
  
  
  
  Increase System Resources:
  
  If the system is under heavy load, consider increasing the resources (CPU, memory) to improve performance and reduce locking duration.
  
  
  
  Configuration Review:
  
  Review the configuration settings related to locking in APO. Ensure that they are set up correctly to minimize conflicts.
  
  
  
  User Training:
  
  Train users on best practices for data access and modification to reduce the likelihood of concurrent access issues.
  
  
  
  Batch Processing:
  
  If applicable, consider using batch processing for certain operations to minimize the number of concurrent accesses.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking conflicts in APO. SAP frequently updates its knowledge base with solutions for common problems.
  System Logs: Review system logs for any additional error messages or warnings that may provide more context about the locking conflicts.
  Performance Monitoring: Use performance monitoring tools to analyze system performance and identify bottlenecks that may contribute to locking issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with SAP support or your internal SAP Basis team for further assistance.