How To Fix MSGC_PLM_SE_MAT026 - Exactly-once request cannot be locked: &1 (error code: &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: MSGC_PLM_SE_MAT -

• Message number: 026

• Message text: Exactly-once request cannot be locked: &1 (error code: &2)

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 MSGC_PLM_SE_MAT026 - Exactly-once request cannot be locked: &1 (error code: &2) ?

  The SAP error message MSGC_PLM_SE_MAT026 indicates that there is an issue with locking a request in the system. The message states that an "exactly-once request cannot be locked," which typically occurs in scenarios where a request is being processed, but the system is unable to acquire the necessary lock on the request due to various reasons.
  Cause:
  
  Concurrency Issues: The request might be locked by another process or user. This can happen if multiple users or processes are trying to access or modify the same request simultaneously.
  System Configuration: There may be configuration settings in the SAP system that affect how locks are managed.
  Database Locking: The underlying database may have locks that prevent the request from being processed.
  Long-running Transactions: If a transaction is taking too long to complete, it may hold onto locks longer than expected, causing other requests to fail.
  
  Solution:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. Identify if the request is locked by another user or process. If necessary, you can delete the lock entry (with caution) if you determine it is safe to do so.
  Wait and Retry: If the lock is held by another process, you may need to wait for that process to complete before retrying your request.
  Review Transaction Logic: If you are developing or maintaining custom code, review the logic to ensure that locks are being managed properly and that there are no unnecessary long-running transactions.
  System Configuration Review: Consult with your SAP Basis team to review the system configuration related to locking mechanisms and ensure they are set up correctly.
  Database Monitoring: If the issue persists, consider monitoring the database for locking issues. Database administrators can help identify and resolve any underlying database locking problems.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related errors or warnings.
  ST22: To check for dumps that might provide more context on the error.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to locking mechanisms and transaction management for best practices.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance.