How To Fix 5W122 - Prefix number &1 is in the customer namespace

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 122

• Message text: Prefix number &1 is in the customer namespace

What causes this issue?

Prefix numbers 900 through 999 are reserved for customers. For this
reason, such entries must not be created in an SAP system.

System Response

The entry cannot be created.

How to fix this error?

Choose a different prefix number.

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 5W122 - Prefix number &1 is in the customer namespace ?

  The SAP error message 5W122 indicates that a prefix number (in this case, &1) is in the customer namespace. This typically occurs when you are trying to create or modify an object (like a function module, class, or table) that uses a prefix reserved for customer-specific developments, but the prefix is not correctly defined or is conflicting with existing objects.
  Cause:
  
  Namespace Conflict: The prefix you are trying to use is already defined in the customer namespace, which is reserved for customer-specific developments.
  Incorrect Prefix Usage: You may be using a prefix that is not allowed or is already in use by another object in the system.
  Development Class Issues: The development class you are using may not be correctly set up to allow the use of certain prefixes.
  
  Solution:
  
  Check Prefix Usage: Verify the prefix you are trying to use. Ensure that it is not already in use by another object in the customer namespace.
  Change Prefix: If the prefix is already in use, consider changing it to a different one that is not conflicting with existing objects.
  Review Development Class: Ensure that the development class you are using is correctly configured to allow the use of the desired prefix.
  Consult Documentation: Refer to SAP documentation or your organization's naming conventions for prefixes to ensure compliance.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  Customer Namespace: In SAP, the customer namespace is typically defined by prefixes that start with "Z" or "Y". These are reserved for customer-specific developments.
  Naming Conventions: It's important to follow the naming conventions set by your organization or SAP to avoid conflicts and ensure clarity in object identification.
  Transaction Codes: You can use transaction codes like SE80 (Object Navigator) or SE11 (Data Dictionary) to check existing objects and their prefixes.
  
  By following these steps, you should be able to resolve the error message 5W122 and continue with your development work in SAP.