How To Fix FL384 - No CHANGING parameters allowed with RFC

FL384 - Overview

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 384

• Message text: No CHANGING parameters allowed with RFC

What causes this issue?

You attempted to create a CHANGING parameter for a remotely called
function module. However, remotely called function modules do not
support CHANGING parameters.

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?

Error message extract from SAP system. Copyright SAP SE.

FL384 - Details

• The SAP error message FL384 ("No CHANGING parameters allowed with RFC") typically occurs when you are trying to call a Remote Function Call (RFC) that has a function module with CHANGING parameters. In RFC-enabled function modules, CHANGING parameters are not allowed because the RFC interface does not support them. 
  
  Cause:
  The primary cause of this error is that the function module you are trying to call via RFC has parameters defined as CHANGING. In an RFC context, all parameters must be either IMPORTING or EXPORTING. CHANGING parameters are not supported because they imply that the data can be modified, which is not feasible in a remote call scenario.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Function Module Definition:
  
  Go to transaction SE37 (Function Module) and check the definition of the function module you are trying to call.
  Look for any parameters defined as CHANGING.
  
  
  
  Modify the Function Module:
  
  If you have access