How To Fix DMU021 - Active alternative segment & cannot be deleted

DMU021 - Overview

• Message type: E = Error

• Message class: DMU - Digital Mock Up (DMU)

• Message number: 021

• Message text: Active alternative segment & cannot be deleted

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMU021 - Active alternative segment & cannot be deleted ?

  The SAP error message DMU021 ("Active alternative segment & cannot be deleted") typically occurs in the context of the SAP Data Migration Workbench or when dealing with alternative segments in the SAP system. This error indicates that you are trying to delete an alternative segment that is currently active, which is not allowed.
  
  Cause:
  
  Active Alternative Segment: The segment you are trying to delete is currently active in the system. This means that it is being used in some capacity, and SAP does not allow the deletion of active segments to maintain data integrity.
  Dependencies: There may be dependencies or references to the segment in other parts of the system, which prevents its deletion.
  
  
  Solution:
  
  
  Deactivate the Segment: Before attempting to delete the segment, you need to deactivate it. This can usually be done through the relevant transaction or configuration settings in SAP.
  
  Navigate to the relevant transaction (e.g., transaction code for managing segments).
  Find the segment