How To Fix DMU020 - Alternative segment & already exists

DMU020 - Overview

• Message type: E = Error

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

• Message number: 020

• Message text: Alternative segment & already exists

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 DMU020 - Alternative segment & already exists ?

  The SAP error message DMU020, which states "Alternative segment & already exists," typically occurs in the context of the SAP Data Migration Workbench or during the process of managing alternative segments in a data migration or master data management scenario. This error indicates that there is an attempt to create or define an alternative segment that already exists in the system.
  
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the alternative segment you are trying to create or define already exists in the system. This could happen if the segment was previously created and not properly deleted or if there is a naming conflict.
  Data Migration Issues: During data migration, if the same alternative segment is being imported multiple times, it can lead to this error.
  Configuration Errors: Incorrect configuration settings or parameters in the data migration process can also lead to this error.
  
  
  Solution:
  
  Check Existing Segments: Before creating a new