How To Fix MC191 - Unexpected error when unlocking (matchcode object &)

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 191

• Message text: Unexpected error when unlocking (matchcode object &)

What causes this issue?

In matchcode object maintenance, the global data of a function
module are locked. An unexpected error occurred during unlocking.

System Response

The system continues.

How to fix this error?

Continue working. A lock problem might occur, however, during futher
matchcode maintenance.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC191 - Unexpected error when unlocking (matchcode object &) ?

  The SAP error message MC191, which states "Unexpected error when unlocking (matchcode object &)," typically occurs in the context of matchcode objects in SAP. This error can arise due to various reasons, including issues with the matchcode object configuration, database inconsistencies, or problems with the underlying data.
  Causes:
  
  Configuration Issues: The matchcode object may not be properly configured or may have missing parameters.
  Database Locking: There could be a database lock that is preventing the unlocking process from completing.
  Inconsistent Data: There may be inconsistencies in the data that the matchcode object is trying to access.
  System Bugs: There could be bugs in the SAP system or specific patches that need to be applied.
  Authorization Issues: The user may not have the necessary authorizations to perform the unlocking operation.
  
  Solutions:
  
  Check Configuration: Review the configuration of the matchcode object in transaction codes like SE11 (Data Dictionary) or SE78 (Matchcode Object Maintenance) to ensure everything is set up correctly.
  Database Locks: Use transaction SM12 to check for any active locks on the database. If you find locks that are preventing the operation, you may need to unlock them.
  Data Consistency: Run consistency checks on the data related to the matchcode object. You can use transaction SE14 to check and repair database inconsistencies.
  System Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that could provide more context about the issue.
  User Authorizations: Ensure that the user has the necessary authorizations to perform the unlocking operation. You can check this in transaction SU53 after the error occurs.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error. There may be patches or updates that resolve the issue.
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11, SM12, SM21, and SE14.
  SAP Notes: Regularly check for updates and patches related to matchcode objects and error MC191 in the SAP Support Portal.
  Documentation: Review SAP documentation related to matchcode objects for best practices and troubleshooting steps.
  
  By following these steps, you should be able to diagnose and resolve the MC191 error in your SAP system.