How To Fix FL020 - Function module not found

FL020 - Overview

• 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.

FL020 - Details

• 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