How To Fix DMU420 - Node &1 is not a view or intial node

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 420

• Message text: Node &1 is not a view or intial node

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 DMU420 - Node &1 is not a view or intial node ?

  The SAP error message DMU420, which states "Node &1 is not a view or initial node," typically occurs in the context of the Data Migration Workbench (DMW) or during data migration activities in SAP. This error indicates that the system is unable to recognize the specified node as a valid view or initial node in the data migration structure.
  Cause:
  
  Incorrect Node Reference: The node specified in the error message may not exist in the data model or may have been incorrectly referenced.
  Configuration Issues: There may be issues with the configuration of the data migration project, such as missing or incorrectly defined views.
  Data Model Changes: If the data model has been changed or updated, the node may have been removed or renamed, leading to this error.
  Authorization Issues: Lack of proper authorizations to access the specified node can also trigger this error.
  
  Solution:
  
  Verify Node Existence: Check if the node referenced in the error message actually exists in the data migration structure. You can do this by navigating to the relevant data migration project and reviewing the nodes.
  Check Configuration: Ensure that the data migration project is correctly configured. This includes verifying that all necessary views are defined and that the initial node is set up properly.
  Review Changes: If there have been recent changes to the data model, review those changes to ensure that they have not affected the node in question.
  Authorization Check: Ensure that the user executing the migration has the necessary authorizations to access the node. You may need to consult with your SAP security team to verify this.
  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.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or fixes related to this error.
  Transaction Codes: Familiarize yourself with transaction codes related to data migration, such as LTMC (Legacy Transfer Migration Cockpit) or LTMOM (Migration Object Modeler).
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed, as other users may have encountered and resolved this error.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.