How To Fix DMU320 - Initial screen for &1 &2 in &3 &4 already exists

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 320

• Message text: Initial screen for &1 &2 in &3 &4 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 DMU320 - Initial screen for &1 &2 in &3 &4 already exists ?

  The SAP error message DMU320, which states "Initial screen for &1 &2 in &3 &4 already exists," typically occurs in the context of the Data Migration Workbench (DMW) or during data migration activities. This error indicates that there is an attempt to create or access an initial screen for a specific object type that already exists in the system.
  Cause:
  
  Duplicate Entry: The most common cause of this error is that there is already an existing initial screen for the specified object type (e.g., a specific data migration object) in the system.
  Configuration Issues: There may be issues with the configuration or setup of the data migration objects, leading to conflicts.
  System State: The system might be in a state where it is trying to create or access an object that is already being processed or has been created previously.
  
  Solution:
  
  Check Existing Objects: Verify if the initial screen for the specified object type already exists. You can do this by navigating to the relevant transaction or using the appropriate SAP tools to list existing data migration objects.
  Delete or Modify: If you find that the initial screen already exists and is not needed, you may consider deleting it or modifying it as necessary. Ensure that you have the appropriate authorizations to perform these actions.
  Review Configuration: Check the configuration settings for the data migration objects to ensure that there are no conflicts or misconfigurations that could lead to this error.
  Consult Documentation: Refer to SAP documentation or notes related to the Data Migration Workbench for any specific guidance or updates that may address this issue.
  Contact SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP support for further assistance. They may provide insights based on the specific context of your system.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes related to data migration, such as LSMW (Legacy System Migration Workbench) or other tools that may be in use.
  SAP Notes: Search for SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  System Logs: Check system logs for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to identify the cause of the DMU320 error and take appropriate action to resolve it.