How To Fix FL138 - Function module & is obsolete - do not use

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 138

• Message text: Function module & is obsolete - do not use

What causes this issue?

The developer or person responsible for a function group declared the
function module to be obsolete.

System Response

Do not use the function module any longer. You can delete it in a later
release.

How to fix this error?

Read the short text or the module documentation for further information
or contact the person responsible for the function group.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL138 - Function module & is obsolete - do not use ?

  The SAP error message FL138 indicates that a specific function module is obsolete and should not be used in your program or application. This typically occurs when SAP has deprecated certain function modules in favor of newer, more efficient, or more secure alternatives. 
  Cause:
  
  Obsolescence: The function module you are trying to use has been marked as obsolete by SAP. This can happen for various reasons, including:
  
  The function module is outdated and has been replaced by a newer version or a different approach.
  SAP is moving towards more modern programming paradigms, such as using BAPIs (Business Application Programming Interfaces) or OData services.
  The function module may have known issues or security vulnerabilities.
  
  
  
  Solution:
  
  
  Identify Alternatives: Check the SAP documentation or the function module's details in the SAP system to find recommended alternatives. You can do this by:
  
  Using transaction code SE37 to view the function module and check for any notes or documentation regarding its obsolescence.
  Searching the SAP Help Portal or SAP Notes for information on the function module and its alternatives.
  
  
  
  Refactor Code: Once you identify the alternative function module or method, refactor your code to replace the obsolete function module with the recommended one. This may involve:
  
  Changing the parameters being passed.
  Adjusting the logic to accommodate the new function module's behavior.
  
  
  
  Testing: After making changes, thoroughly test your application to ensure that it behaves as expected with the new function module.
  
  
  Consult SAP Notes: Look for any relevant SAP Notes that may provide additional guidance or information regarding the obsolescence of the function module and its alternatives.
  
  
  Related Information:
  
  SAP Notes: Always check for SAP Notes related to the specific function module. These notes often provide insights into why the module is obsolete and what to use instead.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered the same issue and what solutions they have implemented.
  Documentation: Review the official SAP documentation for the latest best practices and guidelines on using function modules and APIs.
  
  By following these steps, you can effectively address the FL138 error and ensure that your SAP applications are using supported and secure function modules.