How To Fix ESH_OM_OBJ_MODEL_RP2255 - Model &1 must not start with Y or Z

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_OM_OBJ_MODEL_RP2 - Object Model Repository (2)

• Message number: 255

• Message text: Model &1 must not start with Y or Z

What causes this issue?

The name of model &v1& of software component &v2& must not start with Y
or Z. These letters are reserved for customers and are not to be used
with objects delivered by SAP. Software component &v2& with all its
content is transported, because this software component is assigned to
system software component &v3&.

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?

Rename the model.

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 ESH_OM_OBJ_MODEL_RP2255 - Model &1 must not start with Y or Z ?

  The SAP error message ESH_OM_OBJ_MODEL_RP2255 indicates that a model name you are trying to create or use in the SAP system starts with the letters "Y" or "Z". In SAP, names that start with these letters are typically reserved for customer-specific developments or objects, and certain standard models or objects cannot start with these letters to avoid conflicts or confusion.
  Cause:
  
  The model name you are attempting to use begins with "Y" or "Z", which is not allowed for certain standard models in SAP.
  This restriction is in place to maintain a clear distinction between standard SAP objects and custom objects.
  
  Solution:
  
  
  Rename the Model: Change the name of the model you are trying to create or use so that it does not start with "Y" or "Z". Use a different naming convention that adheres to SAP's guidelines.
  
  
  Check Naming Conventions: Ensure that you are following the correct naming conventions for models in your SAP environment. Typically, standard objects should start with letters other than "Y" or "Z".
  
  
  Consult Documentation: Refer to the SAP documentation or guidelines for naming conventions specific to your version of SAP. This can provide additional context on what is permissible.
  
  
  Contact SAP Support: If you believe that the model should be allowed to start with "Y" or "Z" due to specific business requirements, consider reaching out to SAP support for further assistance or clarification.
  
  
  Related Information:
  
  SAP Naming Conventions: Familiarize yourself with the general naming conventions in SAP, which often dictate how objects should be named to avoid conflicts.
  Custom Development: If you are developing custom objects, ensure that you are aware of the implications of using "Y" or "Z" in your naming strategy.
  Error Handling: When encountering errors like this, always check the exact context in which the error occurs, as it may provide additional clues on how to resolve the issue.
  
  By following these steps, you should be able to resolve the error and proceed with your work in SAP.