How To Fix AXT_MODEL190 - Table uses namespace &1 but enhancement has namespace &2

SAP Error Message - Details

• Message type: E = Error

• Message class: AXT_MODEL -

• Message number: 190

• Message text: Table uses namespace &1 but enhancement has namespace &2

What causes this issue?

Table namespace "&V1&" is not allowed for this enhancement.

System Response

You are not able to generate the enhancement.

How to fix this error?

Choose a table from the namespace of your enhancement. The namespace of
your enhancement is "&V2&".

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 AXT_MODEL190 - Table uses namespace &1 but enhancement has namespace &2 ?

  The SAP error message AXT_MODEL190 indicates a namespace conflict between a table and an enhancement. Specifically, it means that the table you are trying to work with is in one namespace (denoted as &1), while the enhancement you are trying to apply or use is in a different namespace (denoted as &2). This can occur when you are trying to enhance a standard SAP object or when you are working with custom developments that are not aligned in terms of namespaces.
  Cause:
  
  
  Namespace Mismatch: The primary cause of this error is that the table and the enhancement belong to different namespaces. In SAP, namespaces are used to differentiate between standard SAP objects and custom developments. For example, standard SAP objects typically reside in the SAP namespace (e.g., /SAP/), while custom objects might reside in a customer namespace (e.g., /Z/ or /Y/).
  
  
  Incorrect Configuration: Sometimes, the configuration of the enhancement or the table might not be set up correctly, leading to this mismatch.
  
  
  Solution:
  
  
  Check Namespaces: Verify the namespaces of both the table and the enhancement. You can do this by checking the technical settings of the table and the enhancement in the SAP system.
  
  
  Align Namespaces: If you have control over the development, consider aligning the namespaces. This might involve moving the enhancement to the same namespace as the table or vice versa. However, be cautious with this approach, as it may have implications for other developments.
  
  
  Use a Different Enhancement: If aligning namespaces is not feasible, consider using a different enhancement that is compatible with the namespace of the table.
  
  
  Consult Documentation: Review the SAP documentation or notes related to the specific table and enhancement you are working with. There may be specific guidelines or recommendations provided by SAP.
  
  
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They may provide insights or solutions specific to your situation.
  
  
  Related Information:
  
  Namespaces in SAP: Understanding how namespaces work in SAP is crucial for development. Custom developments should ideally be done in a customer namespace to avoid conflicts with standard SAP objects.
  Enhancements and Modifications: Familiarize yourself with the different types of enhancements available in SAP, such as user exits, BAdIs (Business Add-Ins), and enhancement spots, and how they interact with standard objects.
  Development Guidelines: Follow SAP's best practices and guidelines for development to minimize issues related to namespaces and enhancements.
  
  By addressing the namespace conflict, you should be able to resolve the AXT_MODEL190 error and proceed with your development work in SAP.