How To Fix WW077 - Internal error locking hierarchy material &

SAP Error Message - Details

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 077

• Message text: Internal error locking hierarchy material &

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

INCLUDE ISR_WIEDERHOLEN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WW077 - Internal error locking hierarchy material & ?

  The SAP error message WW077, which indicates an "Internal error locking hierarchy material," typically occurs when there is an issue with the locking mechanism in the SAP system related to material hierarchies. This can happen in various scenarios, such as during data processing, updates, or when multiple users are trying to access or modify the same data simultaneously.
  Causes:
  
  Concurrency Issues: Multiple users or processes trying to access or modify the same material hierarchy at the same time can lead to locking conflicts.
  System Bugs: There may be bugs or inconsistencies in the SAP system that cause the locking mechanism to fail.
  Database Locking: The database may have locks that are not being released properly, leading to internal errors.
  Configuration Issues: Incorrect configuration settings in the material management module or related areas can lead to locking issues.
  Transport Issues: If there have been recent transports or changes to the system, they may not have been applied correctly, leading to inconsistencies.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to check for any lock entries related to the material hierarchy. If you find any stale locks, you can delete them if you have the necessary authorizations.
  Review User Activity: Ensure that no other users are currently modifying the same material hierarchy. Communicate with your team to avoid concurrent updates.
  System Restart: In some cases, a system restart may help clear any temporary issues with the locking mechanism.
  Check for Updates/Patches: Ensure that your SAP system is up to date with the latest patches and updates, as these may contain fixes for known bugs.
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error. There may be specific fixes or workarounds provided by SAP.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including transaction codes and any relevant logs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (for lock entries), SM21 (for system logs), and ST22 (for dump analysis) to diagnose the issue further.
  User Authorizations: Ensure that users have the appropriate authorizations to access and modify material hierarchies.
  System Performance: Monitor system performance to ensure that it is not overloaded, which can exacerbate locking issues.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the WW077 error in your SAP system.