How To Fix P99B009 - '&1' is no valid name for function modules

SAP Error Message - Details

• Message type: E = Error

• Message class: P99B - Payroll Versions Basis

• Message number: 009

• Message text: '&1' is no valid name for function modules

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message P99B009 - '&1' is no valid name for function modules ?

  The SAP error message P99B009 indicates that the name provided for a function module is not valid. This error typically arises during the creation or modification of function modules in the ABAP Workbench. Here are the potential causes, solutions, and related information for this error:
  Causes:
  
  
  Invalid Naming Convention: The name of the function module does not adhere to SAP's naming conventions. Function module names must start with a letter and can include letters, numbers, and underscores, but cannot contain special characters or spaces.
  
  
  Reserved Names: The name may be reserved or already in use by another function module or system object.
  
  
  Length Restrictions: The name exceeds the maximum length allowed for function module names, which is typically 30 characters.
  
  
  Namespace Issues: If you are using a custom namespace, ensure that it is correctly defined and that the function module name follows the namespace rules.
  
  
  Solutions:
  
  
  Check Naming Conventions: Ensure that the function module name starts with a letter, contains only valid characters (letters, numbers, underscores), and does not exceed 30 characters.
  
  
  Use Unique Names: Verify that the name you are trying to use is not already taken by another function module or reserved by the system. You can check existing function modules in the SAP system using transaction SE37.
  
  
  Namespace Compliance: If you are working in a custom namespace, ensure that the name follows the correct format (e.g., /Z or /Y for custom namespaces).
  
  
  Modify the Name: If the name is invalid, modify it to comply with the naming conventions and try again.
  
  
  Check for Typos: Ensure there are no typographical errors in the name you are trying to use.
  
  
  Related Information:
  
  Transaction Codes: You can use transaction SE37 to create or modify function modules and check existing ones.
  SAP Documentation: Refer to the official SAP documentation for guidelines on naming conventions and best practices for function modules.
  ABAP Development Guidelines: Familiarize yourself with the ABAP development guidelines provided by SAP, which include naming conventions and other best practices.
  
  By following these steps, you should be able to resolve the error message P99B009 and successfully create or modify your function module in SAP.