How To Fix SF339 - Choose a structure name that starts with "Y" or "Z"

SAP Error Message - Details

• Message type: E = Error

• Message class: SF - SAPfind: Message Texts

• Message number: 339

• Message text: Choose a structure name that starts with "Y" or "Z"

What causes this issue?

You tried to create a structure whose name falls into the area reserved
for SAP.

System Response

The structure was not created.

How to fix this error?

The names of customer structures must begin with the letter "Y" or "Z".
Please choose a name conforming to this convention.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SF339 - Choose a structure name that starts with "Y" or "Z" ?

  The SAP error message SF339, which states "Choose a structure name that starts with 'Y' or 'Z'," typically occurs when you are trying to create a custom structure in the SAP system. In SAP, custom objects such as structures, tables, and programs are required to start with the letters "Y" or "Z" to differentiate them from standard SAP objects. This naming convention helps avoid conflicts with SAP's standard objects and ensures that custom developments are easily identifiable.
  Cause:
  The error occurs when:
  
  You attempt to create a new structure (or other custom object) using a name that does not start with "Y" or "Z".
  The naming convention is not followed, which is a requirement in SAP to maintain the integrity of the system and avoid naming conflicts.
  
  Solution:
  To resolve this error, you should:
  
  Rename the Structure: When creating a new structure, ensure that the name you choose starts with either "Y" or "Z". For example, instead of naming your structure MY_STRUCTURE, you could name it Y_MY_STRUCTURE or Z_MY_STRUCTURE.
  Check Existing Names: If you are modifying an existing structure, ensure that the name adheres to the naming convention. If it does not, you may need to create a new structure with the correct naming convention and migrate any necessary data or logic.
  
  Related Information:
  
  SAP Naming Conventions: Familiarize yourself with SAP's naming conventions for custom objects. This includes not only structures but also tables, programs, function modules, etc.
  Development Guidelines: Follow SAP's development guidelines and best practices to ensure that your custom developments are maintainable and do not interfere with standard SAP functionality.
  Transport Requests: If you are working in a development environment, remember that any changes you make will need to be included in a transport request for them to be moved to other environments (like testing or production).
  
  By adhering to these conventions and guidelines, you can avoid this error and ensure a smoother development process in SAP.