How To Fix /SAPAPO/ATP104 - System error occurred when locking (&2)

/SAPAPO/ATP104 - Overview

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 104

• Message text: System error occurred when locking (&2)

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP104 - System error occurred when locking (&2) ?

  The SAP error message /SAPAPO/ATP104 System error occurred when locking (&2) typically occurs in the context of Advanced Planning and Optimization (APO) when there is an issue with locking mechanisms in the system. This error can arise due to various reasons, including database locks, system inconsistencies, or issues with the application logic.
  Causes:
  
  Database Lock Issues: The system may be trying to lock a resource that is already locked by another process or transaction.
  Concurrency Problems: Multiple users or processes may be trying to access or modify the same data simultaneously, leading to conflicts.
  System Performance Issues: High load on the system can lead to timeouts or failures in acquiring locks.
  
  Configuration Issues: Incorrect configuration settings in the APO system can lead to locking problems.
  Transport Issues: If there have been recent transports or changes in the system, they may have introduced inconsistencies.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. If