How To Fix SO644 - Unknown error while unlocking object & &

SAP Error Message - Details

• Message type: E = Error

• Message class: SO - SAPoffice: message texts

• Message number: 644

• Message text: Unknown error while unlocking object & &

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 SO644 - Unknown error while unlocking object & & ?

  The SAP error message SO644, which states "Unknown error while unlocking object & &," typically occurs when there is an issue with unlocking a locked object in the SAP system. This can happen for various reasons, and understanding the cause and potential solutions can help resolve the issue.
  Possible Causes:
  
  Database Locking Issues: The object may be locked in the database due to a transaction that did not complete properly.
  Authorization Issues: The user attempting to unlock the object may not have the necessary authorizations to perform the unlock operation.
  System Errors: There may be underlying system errors or inconsistencies that are causing the unlock operation to fail.
  Network Issues: Temporary network issues can also lead to errors when trying to unlock objects.
  Object Not Found: The object you are trying to unlock may not exist or may have been deleted.
  
  Solutions:
  
  
  Check Lock Entries: Use transaction code SM12 to check for lock entries related to the object. You can identify the user and the object that is locked and attempt to delete the lock entry if appropriate.
  
  
  Review Authorizations: Ensure that the user has the necessary authorizations to unlock the object. You can check the user's roles and authorizations using transaction code SU53 or SU01.
  
  
  System Logs: Check the system logs for any related error messages that might provide more context. You can use transaction code SM21 to view the system log.
  
  
  Restart the Transaction: Sometimes, simply restarting the transaction or the SAP GUI can resolve temporary issues.
  
  
  Check for Background Jobs: If there are background jobs that are holding locks on the object, you may need to wait for those jobs to complete or terminate them if they are stuck.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, it may be necessary to contact SAP support for further assistance. Provide them with the error message details and any relevant logs.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: View system logs.
  SU53: Analyze authorization failures.
  SM37: Monitor background jobs.
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Documentation: Review SAP documentation for more information on object locking and unlocking processes.
  
  
  By following these steps, you should be able to diagnose and resolve the SO644 error in your SAP system.