How To Fix FL020 - Function module not found

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 020

• Message text: Function module not found

What causes this issue?

There is no function module for the specified include

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?

Use the <LS>Version management</> function in the Function Builder,
specifying the previous name of the function module.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL020 - Function module not found ?

  The SAP error message FL020, which states "Function module not found," typically indicates that the system is unable to locate a specific function module that is required for processing a particular transaction or operation. This can occur for several reasons, and here are some common causes, potential solutions, and related information:
  Causes:
  
  Missing Function Module: The function module may not exist in the system due to a missing transport or an incomplete installation.
  Incorrect Naming: There may be a typo or incorrect naming in the code or configuration that references the function module.
  Authorization Issues: The user may not have the necessary authorizations to access the function module.
  System Configuration: The system may not be properly configured, or there may be inconsistencies in the system environment.
  Version Compatibility: The function module may be part of a specific version of SAP that is not present in the current system.
  
  Solutions:
  
  
  Check Function Module Existence:
  
  Use transaction code SE37 to check if the function module exists in the system. If it does not exist, you may need to create it or transport it from another system.
  
  
  
  Correct Naming:
  
  Review the code or configuration that is calling the function module to ensure that the name is spelled correctly and matches the actual function module name.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to execute the function module. You can check this using transaction SU53 to see if there are any authorization issues.
  
  
  
  Transport Requests:
  
  If the function module is missing, check if it was part of a transport request that was not imported. You may need to import the transport request that contains the function module.
  
  
  
  System Configuration:
  
  Review the system configuration and ensure that all necessary components and packages are installed and configured correctly.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates available that resolve the issue.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can use transaction SE80 or SE37 to debug the program or function module to identify where the error is occurring.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on function modules and their usage.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  SAP Support: If the issue persists and you have a support contract, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify the cause of the FL020 error and implement a suitable solution.