How To Fix MH344 - Not all data records to be changed (table &) could be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: MH - Maintain Material Master Data (Retail)

• Message number: 344

• Message text: Not all data records to be changed (table &) could be locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MH344 - Not all data records to be changed (table &) could be locked ?

  The SAP error message MH344 indicates that not all data records in a specified table could be locked during a transaction. This typically occurs when there are issues with data consistency or when other processes are accessing the same records, preventing the current transaction from obtaining the necessary locks.
  Causes:
  
  Concurrent Access: Another user or process is currently accessing or locking the same records in the database table.
  Lock Table Overflow: The lock table may be full, preventing new locks from being acquired.
  Database Issues: There may be underlying database issues, such as deadlocks or other locking mechanisms that are preventing access.
  Authorization Issues: The user may not have the necessary authorizations to lock the records in the specified table.
  Long-running Transactions: If a transaction is taking too long to complete, it may hold locks longer than expected, causing other transactions to fail.
  
  Solutions:
  
  
  Check for Concurrent Users: Use transaction codes like SM12 (to view and manage locks) to check if other users are holding locks on the records you are trying to access. If so, you may need to wait for those transactions to complete or coordinate with the other users.
  
  
  Increase Lock Table Size: If the lock table is full, you may need to increase its size. This can be done by adjusting the parameters in the SAP profile (e.g., enque/table_size).
  
  
  Review Authorizations: Ensure that the user has the necessary authorizations to lock the records in the specified table. This can be checked in transaction SU53 or by reviewing the user's roles and authorizations.
  
  
  Optimize Transactions: Review the transactions that are taking a long time to complete and optimize them to reduce the time locks are held.
  
  
  Database Monitoring: Use database monitoring tools to check for deadlocks or other issues that may be affecting locking behavior.
  
  
  Retry the Operation: Sometimes, simply retrying the operation after a short wait can resolve the issue if it was caused by temporary contention.
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related errors.
  ST22: To check for dumps that may provide more context on the issue.
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message MH344. You can search for relevant notes in the SAP Support Portal.
  
  
  Performance Tuning: Consider performance tuning for the database and SAP system to minimize locking issues in the future.
  
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.