How To Fix FL106 - Use an underscore (_) instead of a hyphen (-)

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 106

• Message text: Use an underscore (_) instead of a hyphen (-)

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 an alphanumeric name. This may also contain an underscore.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL106 - Use an underscore (_) instead of a hyphen (-) ?

  The SAP error message FL106, which states "Use an underscore (_) instead of a hyphen (-)," typically occurs in the context of data entry or configuration where specific formatting rules are enforced. This error is often related to the naming conventions for certain fields, such as user IDs, account numbers, or other identifiers that do not allow hyphens.
  Cause:
  The error is triggered when a user attempts to enter a value that includes a hyphen (-) in a field that only accepts underscores (_). This is a common requirement in SAP systems to ensure consistency and avoid issues with data processing.
  Solution:
  To resolve the FL106 error, follow these steps:
  
  
  Identify the Field: Determine which field is causing the error. This could be in various transactions or configuration settings.
  
  
  Replace Hyphens with Underscores: Edit the entry by replacing any hyphens (-) with underscores (_). For example, if you have an entry like user-name, change it to user_name.
  
  
  Save Changes: After making the necessary changes, save the entry and check if the error persists.
  
  
  Review Documentation: If you are unsure about the naming conventions, refer to the relevant SAP documentation or guidelines for the specific module you are working with.
  
  
  Related Information:
  
  
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message. SAP frequently updates its documentation and may provide additional context or solutions.
  
  
  Field Specifications: Review the specifications for the fields you are working with to ensure compliance with naming conventions.
  
  
  User Training: If this error occurs frequently, consider providing training or guidelines to users on the correct formatting to prevent future occurrences.
  
  
  System Configuration: In some cases, the system configuration may enforce these rules. If you believe the rules are too restrictive, you may need to consult with your SAP administrator or technical team to discuss potential adjustments.
  
  
  By following these steps, you should be able to resolve the FL106 error and continue with your SAP tasks without further issues.