How To Fix DMU118 - No relationship is allowed from node &1 to node &1

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 118

• Message text: No relationship is allowed from node &1 to node &1

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMU118 - No relationship is allowed from node &1 to node &1 ?

  The SAP error message DMU118 "No relationship is allowed from node &1 to node &1" typically occurs in the context of the Data Migration Workbench (DMW) or during the use of the Data Migration Utility (DMU) in SAP. This error indicates that there is an attempt to create a relationship between two nodes (or entities) that are not allowed to be related to each other, specifically when both nodes are the same.
  Cause:
  
  Self-Referencing Relationship: The error usually arises when there is an attempt to create a self-referencing relationship, meaning that a node is trying to reference itself, which is not permitted in the context of the data model being used.
  Incorrect Configuration: The data model or configuration may not allow for certain types of relationships, and the attempt to create such a relationship violates the defined rules.
  Data Integrity Rules: The underlying data integrity rules of the system may prevent certain relationships from being established to maintain data consistency.
  
  Solution:
  
  Review Relationships: Check the relationships defined in your data model. Ensure that you are not trying to create a relationship from a node to itself.
  Correct Node References: If you intended to create a relationship between two different nodes, ensure that you are referencing the correct nodes and not mistakenly using the same node identifier.
  Consult Documentation: Refer to the SAP documentation for the specific data model you are working with to understand the allowed relationships and constraints.
  Adjust Data Model: If necessary, adjust the data model to accommodate the required relationships, ensuring that they comply with the rules set by SAP.
  Testing: After making changes, test the configuration to ensure that the error does not reoccur.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling relationships in the Data Migration Workbench.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed, and solutions shared.
  Training and Documentation: Consider reviewing training materials or documentation related to the Data Migration Utility and its configuration to better understand how to manage relationships between nodes.
  
  By following these steps, you should be able to resolve the DMU118 error and successfully manage the relationships in your SAP data model.