How To Fix WA671 - Receiver type determination func. module &: Error determining interface

WA671 - Overview

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 671

• Message text: Receiver type determination func. module &: Error determining interface

What causes this issue?

An error occurred, which could not be identified, when determining the
interface of the specified function module for determing the receiver
type.

System Response

The action was terminated, an event was not triggered.

How to fix this error?

Check the definition of the specified function module for determining
the receiver type.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WA671 - Receiver type determination func. module &: Error determining interface ?

  SAP Error Message:
  WA671 Receiver type determination func. module & : Error determining interface
  
  Cause
  This error occurs during the processing of IDocs (Intermediate Documents) in SAP ALE/EDI scenarios. Specifically, it happens when the system tries to determine the receiver partner type or interface using a function module configured for receiver determination, but the function module either:
  
  Does not exist,
  Is not correctly implemented,
  Returns an error,
  Or the interface determination logic fails due to missing or incorrect data.
  
  In other words, the system calls a custom or standard function module to determine the receiver type or interface for an IDoc, and this function module cannot successfully determine the interface, causing the error.
  
  When does it occur?
  
  During inbound or outbound IDoc processing.
  When the system tries to determine the receiver partner type or interface dynamically.
  In ALE distribution model processing or EDI partner profile processing.
  When a custom function module is assigned for receiver determination in transaction WE20 or WE57.
  
  
  Common Causes in