How To Fix /SAPAPO/ATP105 - System error occurred when unlocking (&2)

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 105

• Message text: System error occurred when unlocking (&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/ATP105 - System error occurred when unlocking (&2) ?

  The SAP error message /SAPAPO/ATP105 typically indicates that there was a system error when attempting to unlock a specific object in the Advanced Planning and Optimization (APO) module, particularly related to Available-to-Promise (ATP) checks. This error can occur due to various reasons, including database issues, locking conflicts, or inconsistencies in the system.
  Causes:
  
  Database Locking Issues: The object you are trying to unlock may be locked by another process or transaction.
  System Inconsistencies: There may be inconsistencies in the APO system or the underlying database that prevent the unlocking process.
  Authorization Issues: The user may not have the necessary authorizations to perform the unlock operation.
  Technical Errors: There could be a bug or technical error in the SAP system that is causing the issue.
  
  Solutions:
  
  Check Locks: Use transaction SM12 to check for any existing locks on the object. If you find a lock that should not be there, you can delete it if you have the necessary authorizations.
  Review System Logs: Check the system logs (transaction SM21) for any related error messages that might provide more context about the issue.
  Authorization Check: Ensure that the user attempting to unlock the object has the necessary authorizations. You can check this using transaction SU53 after the error occurs.
  Restart the Process: Sometimes, simply restarting the transaction or process can resolve temporary issues.
  Database Consistency Check: If the issue persists, consider running a consistency check on the database or the APO system to identify and resolve any inconsistencies.
  Contact SAP Support: If none of the above solutions work, it may be necessary to contact SAP support for further assistance, especially if it appears to be a bug or a deeper technical issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (for lock entries), SM21 (for system logs), and SU53 (for authorization checks).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide patches and updates.
  System Documentation: Review the documentation for your specific version of SAP APO, as there may be version-specific considerations or known issues.
  
  By following these steps, you should be able to diagnose and potentially resolve the /SAPAPO/ATP105 error.