How To Fix DMU149 - No relationship type is defined between node type &1 and &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 149

• Message text: No relationship type is defined between node type &1 and &2

Self-Explanatory Message

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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 DMU149 - No relationship type is defined between node type &1 and &2 ?

  The SAP error message DMU149 indicates that there is no defined relationship type between two node types in the context of a Data Model Update (DMU) or a similar data modeling scenario. This error typically arises when you are trying to create or manipulate relationships between different entities (nodes) in a data model, but the system does not recognize a valid relationship type between the specified node types.
  Cause:
  
  Missing Relationship Definition: The primary cause of this error is that the relationship type between the two specified node types has not been defined in the system.
  Incorrect Node Types: The node types specified in the error message may not be correctly configured or may not exist in the system.
  Configuration Issues: There may be issues in the configuration of the data model or the underlying data structure that prevent the establishment of relationships.
  
  Solution:
  
  
  Define Relationship Type:
  
  Go to the relevant configuration area in SAP where you can define relationships between node types.
  Create a new relationship type that links the two specified node types. Ensure that the relationship is correctly defined with the necessary attributes and properties.
  
  
  
  Check Node Type Configuration:
  
  Verify that both node types involved in the error are correctly configured and exist in the system.
  Ensure that there are no typos or discrepancies in the node type names.
  
  
  
  Review Data Model:
  
  Review the overall data model to ensure that it is correctly set up and that all necessary relationships are defined.
  If you are working with a specific application or module, consult the documentation for that module to ensure compliance with its requirements.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for guidance on defining relationships between node types. This may include checking for any prerequisites or dependencies that need to be addressed.
  
  
  
  Testing:
  
  After defining the relationship, test the changes to ensure that the error no longer occurs and that the relationship functions as expected.
  
  
  
  Related Information:
  
  Transaction Codes: Depending on your SAP version and configuration, you may use transaction codes like SPRO (to access the SAP Reference IMG) to navigate to the relevant configuration settings.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on relationship definitions.
  Community Forums: Consider visiting SAP Community forums or other user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to resolve the DMU149 error and successfully define the necessary relationship between the specified node types.