How To Fix USMD1258 - Data model &1: namespace/prefix for structure generation not valid

USMD1258 - Overview

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 258

• Message text: Data model &1: namespace/prefix for structure generation not valid

What causes this issue?

Prefix/namespace is filled with a non valid entry. You have chosen a
different entry for the prefix/namespace than in Customizing activity
<DS:SIMG.MDG_VC_USMD004_0>Data Model-Specific Structures</>.

System Response

Data model-specific structures are not generated automatically.

How to fix this error?

For automatic data model specific structure generation, use the same
prefix/namespace as in Customizing activity <LS>Data Model-Specific
Structures</>.

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 USMD1258 - Data model &1: namespace/prefix for structure generation not valid ?

  The SAP error message USMD1258 indicates that there is an issue with the namespace or prefix used for structure generation in the context of a data model. This error typically arises in the SAP Master Data Governance (MDG) environment when the system is unable to recognize or validate the namespace or prefix specified for a data model.
  
  Cause:
  
  Invalid Namespace/Prefix: The namespace or prefix defined in the data model is not valid or does not conform to the expected format.
  
  Configuration Issues: There may be configuration issues in the MDG settings that lead to the namespace/prefix not being recognized.
  Missing Entries: The required entries for the namespace or prefix may be missing in the relevant configuration tables.
  Transport Issues: If the data model was transported from another system, there may be inconsistencies or missing configurations in the target system.
  
  
  Solution:
  
  Check Namespace/Prefix: Verify that the namespace and prefix used in the data model are correctly defined. Ensure