How To Fix MMRP01324 - Lock error in matrix for plan vers. &1, prod. &2, loc. &3, prod. vers.&4

SAP Error Message - Details

• Message type: E = Error

• Message class: MMRP01 - Rapid Planning Matrix

• Message number: 324

• Message text: Lock error in matrix for plan vers. &1, prod. &2, loc. &3, prod. vers.&4

What causes this issue?

Locking the matrix for plan version &V1&, product &V2&, location &V3&,
production version &V4& , to protect it from multiple parallel changes,
failed.
The reason may be that the matrix is already blocked by another
process.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MMRP01324 - Lock error in matrix for plan vers. &1, prod. &2, loc. &3, prod. vers.&4 ?

  The SAP error message MMRP01324 indicates a lock error in the matrix for a specific planning version, product, location, and product version. This error typically occurs in the context of Material Requirements Planning (MRP) or similar planning processes within SAP.
  Cause:
  The lock error usually arises due to one of the following reasons:
  
  Concurrent Access: Another user or process is currently accessing or modifying the same planning data, leading to a lock on the matrix.
  Long-Running Transactions: A transaction that takes too long to complete may hold a lock on the data, preventing other processes from accessing it.
  System Configuration Issues: There may be issues with the configuration of the planning version or the matrix itself.
  
  Solution:
  To resolve the MMRP01324 error, you can take the following steps:
  
  
  Check for Active Locks:
  
  Use transaction code SM12 to check for active locks on the specified planning version, product, location, and product version. If you find locks that are no longer needed, you can delete them (ensure you have the necessary authorizations).
  
  
  
  Identify the User/Process:
  
  In SM12, you can identify which user or process is holding the lock. Communicate with the user or check the process to see if they can release the lock.
  
  
  
  Wait and Retry:
  
  If the lock is due to a legitimate process, you may need to wait for that process to complete and then retry your operation.
  
  
  
  Review Long-Running Transactions:
  
  If you notice that certain transactions are taking too long, investigate and optimize them to reduce the likelihood of locking issues in the future.
  
  
  
  Check Configuration:
  
  Review the configuration of the planning version and matrix settings to ensure they are set up correctly.
  
  
  
  System Performance:
  
  If locking issues are frequent, consider reviewing system performance and tuning database settings to improve response times.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM12: Display and manage locks.
  SM21: Check system logs for any related errors or warnings.
  ST22: Analyze dumps that may provide insights into the issue.
  
  
  
  SAP Notes: 
  
  Check SAP Notes related to MRP and locking issues for any specific patches or recommendations.
  
  
  
  Documentation: 
  
  Review SAP documentation on MRP and locking mechanisms to understand how locks are managed in the system.
  
  
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.