How To Fix MDG_DT_DATA_MODEL129 - &1 and &2 in SAP namespace; relation name must be in customer namespace

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_DT_DATA_MODEL - Messages for the Configuration Workbench Model Access API

• Message number: 129

• Message text: &1 and &2 in SAP namespace; relation name must be in customer namespace

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 MDG_DT_DATA_MODEL129 - &1 and &2 in SAP namespace; relation name must be in customer namespace ?

  The SAP error message MDG_DT_DATA_MODEL129 typically indicates an issue related to data model definitions in SAP Master Data Governance (MDG). The message suggests that a relation name must be in the customer namespace, which means that the relation you are trying to use is not defined correctly or is not in the expected namespace.
  Cause:
  
  Namespace Issue: The relation name you are trying to use is likely in the standard SAP namespace instead of the customer namespace. In SAP, customer-specific developments should be done in the customer namespace (usually starting with "Z" or "Y").
  Incorrect Configuration: The data model or the relationship you are trying to define may not be configured correctly in the MDG system.
  Missing Customization: If you are trying to use a relation that has not been properly defined or customized in your MDG setup, this error can occur.
  
  Solution:
  
  Check Relation Name: Ensure that the relation name you are using is defined in the customer namespace. If it is not, you will need to create a new relation in the customer namespace.
  Create/Modify Relation:
  
  Go to the relevant transaction (e.g., MDGIMG or MDG_MAINTAIN_DATA_MODEL) to define or modify the relation.
  Ensure that the relation name starts with "Z" or "Y" to comply with the customer namespace requirement.
  
  
  Review Data Model Configuration: Check the configuration of your data model to ensure that all relations are correctly defined and that there are no missing or incorrect entries.
  Transport Requests: If you have recently made changes to the data model or relations, ensure that they have been properly transported to the system where you are encountering the error.
  Consult Documentation: Refer to SAP documentation or notes related to MDG and data model configuration for additional guidance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  MDG Configuration Guide: Review the MDG configuration guide for best practices on defining data models and relations.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.