How To Fix FL105 - Use only the underscore (_) as a separator

FL105 - Overview

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 105

• Message text: Use only the underscore (_) as a separator

What causes this issue?

You used an invalid character when you entered the name of the function
module. Refer to the F1 help for the naming conventions for function
modules.

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?

Enter a name consisting only of alphanumeric characters and possibly
one underscore.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL105 - Use only the underscore (_) as a separator ?

  The SAP error message FL105, which states "Use only the underscore (_) as a separator," typically occurs in the context of naming conventions for certain fields or identifiers in SAP, particularly when dealing with financial documents, account assignments, or other structured data inputs.
  
  Cause:
  The error is triggered when a user attempts to use characters other than the underscore (_) as a separator in naming conventions. This can happen in various scenarios, such as:
  
  When entering a name for a financial document, account, or other identifiers that require a specific format.
  When using special characters, spaces, or other punctuation marks that are not allowed in the naming convention.
  
  
  Solution:
  To resolve the FL105 error, follow these steps:
  
  
  Check Naming Conventions: Ensure that you are using the correct naming conventions as specified by your organization's SAP guidelines. Only use underscores (_) as separators.
  
  
  Modify Input: If you have entered a name or identifier that includes invalid characters (like spaces,