How To Fix 5W121 - Warning: prefix number &1 is in the partner namespace

SAP Error Message - Details

• Message type: E = Error

• Message class: 5W - Messages for PD (Particularly Workflow)

• Message number: 121

• Message text: Warning: prefix number &1 is in the partner namespace

What causes this issue?

Prefix numbers 800 through 899 are reserved for the developments of SAP
partners. Do not create objects within this range, as they could be
overwritten by objects created by SAP partners.

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?

Please choose a different prefix number.

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 5W121 - Warning: prefix number &1 is in the partner namespace ?

  The SAP error message 5W121 with the warning "prefix number &1 is in the partner namespace" typically relates to issues with XML namespaces in the context of SAP PI/PO (Process Integration/Process Orchestration) or when dealing with web services.
  Cause:
  This warning indicates that the prefix number specified in your XML message is being used in a namespace that is not recognized or is conflicting with another namespace. In XML, namespaces are used to avoid naming conflicts by qualifying names with a URI. The warning suggests that the prefix you are using is already defined in a partner namespace, which can lead to ambiguity in the interpretation of the XML document.
  Solution:
  To resolve this warning, you can take the following steps:
  
  
  Check Namespace Definitions: Review the XML message and ensure that the namespace prefixes are correctly defined. Make sure that the prefix you are using is not already defined in the partner's namespace.
  
  
  Modify Prefixes: If the prefix is indeed conflicting, consider changing the prefix in your XML message to a unique one that does not conflict with the partner's namespace.
  
  
  Update Mapping: If you are using a mapping tool (like SAP PI/PO), check the mapping configuration to ensure that the correct namespaces are being used and that there are no conflicts.
  
  
  Consult Documentation: Refer to the documentation for the specific integration scenario you are working on. There may be guidelines on how to handle namespaces properly.
  
  
  Testing: After making changes, test the integration scenario to ensure that the warning is resolved and that the message is processed correctly.
  
  
  Related Information:
  
  XML Namespaces: Understanding how XML namespaces work is crucial. Each namespace is defined by a URI, and prefixes are just shorthand references to these URIs.
  SAP PI/PO Documentation: SAP provides extensive documentation on how to handle XML messages and namespaces in PI/PO scenarios.
  Error Handling: Familiarize yourself with how SAP handles warnings and errors in integration scenarios, as this can help in troubleshooting similar issues in the future.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support or consulting with a technical expert who specializes in SAP integration scenarios.