How To Fix CNV_PE751 - Namespace '&1' of object with ID &2 is not allowed to be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 751

• Message text: Namespace '&1' of object with ID &2 is not allowed to be changed

What causes this issue?

Namespace:,,<ZH>&V1&</>
Object ID:,,<ZH>&V2&</>
Object Type:,,<ZH>&V3&</>
Object name (if existing):,,<ZH>&V4&</>

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE751 - Namespace '&1' of object with ID &2 is not allowed to be changed ?

  The SAP error message "CNV_PE751 Namespace '&1' of object with ID &2 is not allowed to be changed" typically occurs during data migration or conversion processes, particularly when using SAP's tools for data transfer or transformation. This error indicates that the system is trying to modify an object in a namespace that is not permitted for changes.
  Cause:
  
  Namespace Restrictions: In SAP, certain namespaces are reserved for specific purposes (e.g., SAP standard objects) and are not meant to be modified by users or custom developments. If you attempt to change an object that resides in such a namespace, you will encounter this error.
  Object ID Issues: The object ID specified in the error message may refer to a specific data structure or configuration that is locked or restricted from modification.
  Transport Layer Issues: If the object is part of a transport request, it may be locked or restricted due to transport layer settings.
  
  Solution:
  
  Check Namespace: Verify the namespace of the object you are trying to modify. If it is a standard SAP namespace (like /SAP/), you will not be able to change it. Consider creating a custom object in your own namespace.
  Use Custom Namespace: If you need to create or modify objects, ensure that you are using a custom namespace (e.g., /Z/ or /Y/) that allows for changes.
  Review Object ID: Check the object ID mentioned in the error message to ensure it is correct and that you have the necessary permissions to modify it.
  Consult Documentation: Refer to SAP documentation or notes related to the specific object or migration process you are working with. There may be specific guidelines or restrictions.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is related to a standard SAP object.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide additional context.
  Data Migration Tools: Familiarize yourself with the data migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) and their documentation for best practices.
  Authorization Checks: Ensure that your user account has the necessary authorizations to perform the actions you are attempting.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.