How To Fix WA654 - Receiver function module &: Parameter & is not optional

WA654 - Overview

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 654

• Message text: Receiver function module &: Parameter & is not optional

What causes this issue?

The specified parameter of the specified receiver function module is
not optional. Since it is not filled when SWE_EVENT_CREATE is called,
this is not allowed.

System Response

The action was terminated, the event was not triggered.

How to fix this error?

Define the specified parameter as optional and assign it a standard
value.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WA654 - Receiver function module &: Parameter & is not optional ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WA654 Receiver function module &: Parameter & is not optional
  
  
  Cause:
  This error occurs when a remote function call (RFC) or a BAPI is invoked, and the receiver function module expects a certain parameter to be passed, but the calling program or interface is not providing it. The parameter in question is defined as mandatory (not optional) in the function module's interface, so omitting it leads to this error.
  In other words, the function module you are trying to call requires a specific parameter, but the parameter is missing or not supplied in the call.
  
  Explanation:
  
  
  The message text indicates:
  
  & (first placeholder) = the name of the receiver function module.
  & (second placeholder) = the name of the parameter that is missing but required.
  
  
  
  This typically happens in scenarios involving:
  
  Remote Function Calls (RFC)
  BAPI calls
  ALE/IDoc processing where a function module is called remotely
  Custom developments or enhancements where