How To Fix USMD1018 - Data model &1, entity type &2, relationship &3: Data element specified

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 018

• Message text: Data model &1, entity type &2, relationship &3: Data element specified

What causes this issue?

A data element cannot be specified for relationships with <LS>Leading</>
or <LS>Qualifying</> as the relationship type. The system always uses
the data element assigned to the referenced entity type. The field name
in the internal data structures also corresponds to the field name of
the referenced entity type.

System Response

The data model cannot be saved or activated.

How to fix this error?

Delete the settings for the data element or change the relationship
type.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1018 - Data model &1, entity type &2, relationship &3: Data element specified ?

  The SAP error message USMD1018 typically occurs in the context of SAP Master Data Governance (MDG) when there is an issue related to the data model, entity type, or relationship specified in the error message. This error indicates that a data element has been specified incorrectly or is not recognized in the context of the data model you are working with.
  Cause:
  
  Incorrect Data Element: The data element specified in the error message may not exist or may not be correctly defined in the data model.
  Model Configuration Issues: There may be issues with the configuration of the data model, such as missing or incorrectly defined relationships between entities.
  Inconsistent Data: The data being processed may not conform to the expected structure or rules defined in the data model.
  Transport Issues: If the data model was recently transported from another system, there may be inconsistencies or missing components.
  
  Solution:
  
  Check Data Element Definition: Verify that the data element specified in the error message exists in the data dictionary and is correctly defined.
  Review Data Model Configuration: Go to the MDG data model configuration and ensure that the entity type and relationships are correctly set up. Check for any missing relationships or incorrect mappings.
  Validate Data: Ensure that the data being processed adheres to the rules and structure defined in the data model. This may involve checking for required fields, data types, and value ranges.
  Transport Consistency: If the issue arose after a transport, check that all necessary components were transported correctly. You may need to re-transport or adjust the configuration in the target system.
  Debugging: If the issue persists, consider using debugging tools to trace the execution and identify where the error is occurring in the code.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the error message USMD1018 for any specific patches or updates that may address known issues.
  MDG Documentation: Review the official SAP documentation for Master Data Governance to understand the data model structure and configuration guidelines.
  Community Forums: Engage with SAP community forums or support channels to see if others have encountered similar issues and what solutions they found effective.
  
  By following these steps, you should be able to identify the root cause of the USMD1018 error and implement a suitable solution.