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

SAP Error Message - Details

• 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 Detail
  
  Incorrect or missing function module name in the partner profile or distribution model.
  Function module not implemented or active in the system.
  Function module logic error: The function module does not return the expected interface or partner type.
  Missing or incorrect partner data that the function module relies on.
  Authorization issues preventing the function module from executing properly.
  Transport or system inconsistencies where the function module exists in one system but not in another.
  
  
  Solution
  
  
  Check the function module assigned for receiver determination:
  
  Go to transaction WE20 (Partner Profiles) or WE57 (Assign Function Module for Receiver Determination).
  Verify the function module name assigned for receiver type determination.
  Ensure the function module exists in the system (use SE37 to check).
  
  
  
  Test the function module manually:
  
  Use SE37 to test the function module with sample input parameters.
  Check if it returns the correct interface or partner type.
  Debug the function module if necessary to find where it fails.
  
  
  
  Correct or implement the function module:
  
  If the function module is missing, create or import it.
  If it is custom, check the logic and fix any errors.
  Ensure it returns the correct interface and partner type as expected by the system.
  
  
  
  Check partner data and distribution model:
  
  Verify that the partner profiles and distribution model entries are correct.
  Ensure all necessary data for interface determination is maintained.
  
  
  
  Check authorizations:
  
  Make sure the user or background job running the IDoc processing has the necessary authorizations to execute the function module.
  
  
  
  Transport and system consistency:
  
  If the function module exists in development but not in production, transport it.
  Ensure all related objects are consistent across systems.
  
  
  
  Review SAP Notes:
  
  Search for SAP Notes related to WA671 error for your SAP version.
  Sometimes SAP provides patches or corrections for known issues.
  
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  WE20 - Partner Profiles
  WE57 - Assign Function Module for Receiver Determination
  SE37 - Function Module Test
  BD87 - IDoc Reprocessing
  
  
  
  IDoc Processing:
  
  The receiver determination function module is used to dynamically determine the receiver partner type or interface during IDoc processing.
  This is important in scenarios where multiple receivers or interfaces exist, and the system must decide which one to use.
  
  
  
  SAP Help and Documentation:
  
  ALE and EDI configuration guides.
  SAP Notes and Knowledge Base Articles on IDoc processing errors.
  
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WA671 Receiver type determination function module error
  
  
  Cause
  Function module for receiver determination missing, incorrect, or failing
  
  
  Solution
  Verify and correct the function module, test it, check partner profiles and distribution model
  
  
  Tools
  WE20, WE57, SE37, BD87
  
  
  Additional Notes
  Check SAP Notes for patches or known issues
  
  
  
  
  If you provide the exact function module name or scenario, I can help you with more specific debugging steps or code examples.