How To Fix M2421 - No source field maintained for unit & and event & in TMC24

SAP Error Message - Details

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 421

• Message text: No source field maintained for unit & and event & in TMC24

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 M2421 - No source field maintained for unit & and event & in TMC24 ?

  The SAP error message M2421 indicates that there is no source field maintained for a specific unit and event in the TMC24 table. This error typically arises in the context of materials management and inventory management processes, particularly when dealing with the transfer of data between different units of measure or events.
  Cause:
  The error occurs when the system is trying to process a transaction that requires a mapping between a source field (like a unit of measure) and a specific event, but this mapping is not defined in the TMC24 table. This can happen due to:
  
  Missing Configuration: The necessary configuration for the unit of measure or event has not been set up in the system.
  Incorrect Data Entry: The unit of measure or event being used in the transaction does not exist in the TMC24 table.
  Custom Developments: If there are custom developments or enhancements, they may not be correctly referencing the TMC24 table.
  
  Solution:
  To resolve the M2421 error, you can follow these steps:
  
  
  Check TMC24 Configuration:
  
  Go to transaction code SPRO and navigate to the relevant configuration area for units of measure and events.
  Ensure that the necessary entries for the specific unit and event are maintained in the TMC24 table.
  
  
  
  Maintain Source Fields:
  
  If the required source field is missing, you will need to add it. This can typically be done by:
  
  Accessing the TMC24 table directly (using transaction SE11 or SE16).
  Adding the missing entries for the unit and event combination.
  
  
  
  
  
  Verify Unit of Measure and Event:
  
  Double-check the unit of measure and event being used in the transaction to ensure they are valid and correctly spelled.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for any specific requirements related to the configuration of TMC24.
  
  
  
  Testing:
  
  After making the necessary changes, test the transaction again to ensure that the error has been resolved.
  
  
  
  Seek Help from SAP Support:
  
  If the issue persists after checking the configuration and maintaining the necessary entries, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  TMC24 Table: This table is used to maintain the mapping of source fields for different units of measure and events. Understanding its structure and purpose is crucial for troubleshooting this error.
  Unit of Measure Configuration: Familiarize yourself with how units of measure are configured in SAP, as this can help prevent similar issues in the future.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  
  By following these steps, you should be able to resolve the M2421 error and ensure that your SAP system can process the relevant transactions without issues.