How To Fix /SAPAPO/TSM548 - No lock monitor (SNP and DP) is active

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TSM -

• Message number: 548

• Message text: No lock monitor (SNP and DP) is active

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 /SAPAPO/TSM548 - No lock monitor (SNP and DP) is active ?

  The SAP error message /SAPAPO/TSM548 No lock monitor (SNP and DP) is active typically occurs in the context of SAP Advanced Planning and Optimization (APO), specifically when dealing with the Supply Network Planning (SNP) and Demand Planning (DP) modules. This error indicates that the lock monitor, which is essential for managing concurrent access to planning data, is not active. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Lock Monitor Not Started: The lock monitor for SNP and DP is not running. This can happen if the system was not properly configured or if the lock monitor was stopped for some reason.
  System Configuration Issues: There may be configuration issues in the APO system that prevent the lock monitor from starting.
  Background Job Issues: The background job responsible for starting the lock monitor may not be scheduled or may have failed.
  
  Solution:
  
  
  Start the Lock Monitor:
  
  You can manually start the lock monitor by executing the transaction code /SAPAPO/TSM in the SAP GUI. This will allow you to start the lock monitor for SNP and DP.
  Ensure that the lock monitor is set to start automatically in the background jobs.
  
  
  
  Check Background Jobs:
  
  Go to transaction code SM37 to check the status of background jobs. Look for jobs related to the lock monitor and ensure they are running without errors.
  If the job is not scheduled, you may need to create a new background job to start the lock monitor.
  
  
  
  Review System Configuration:
  
  Check the configuration settings in the APO system to ensure that the lock monitor is properly configured. This may involve reviewing settings in transaction codes like /SAPAPO/TSM or /SAPAPO/DP for demand planning.
  
  
  
  Consult SAP Notes:
  
  Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  
  
  
  System Restart:
  
  In some cases, a system restart may be necessary to reset the state of the lock monitor.
  
  
  
  Related Information:
  
  Documentation: Refer to the SAP Help Portal for detailed documentation on configuring and managing the lock monitor in APO.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it impacts business operations.
  
  By following these steps, you should be able to resolve the error message /SAPAPO/TSM548 No lock monitor (SNP and DP) is active and ensure that your planning processes in SAP APO function smoothly.