How To Fix SIW379 - No proxy class could be determined for proxy interface &1

SIW379 - Overview

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 379

• Message text: No proxy class could be determined for proxy interface &1

What causes this issue?

An inconsistency was detected with the ABAP proxy: to a give proxy
interface no proxy class could be determined.

System Response

The current action is aborted with an exception message.
If the action is the creation of a new project, the project will not be
established.

How to fix this error?

Go to the ABAP proxy (transaction SPROXY) and check it.
Generate the proxy if necessary.
Activate the proxy if is not active.
Verify that the proxy class is specified and active.
Verify that no other classes exist that implement the proxy interface
(e.g. after a replacement of the proxy class the former class must be
deleted).

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SIW379 - No proxy class could be determined for proxy interface &1 ?

  The SAP error message SIW379 indicates that the system is unable to determine a proxy class for a specified proxy interface. This typically occurs in the context of SAP Process Integration (PI) or SAP Process Orchestration (PO) when dealing with web services or service-oriented architecture (SOA).
  
  Cause:
  
  Missing Proxy Class: The most common cause is that the proxy class for the specified proxy interface has not been generated or is missing in the system.
  Incorrect Configuration: There may be an issue with the configuration of the service or the proxy interface in the Enterprise Services Repository (ESR).
  Transport Issues: If the proxy class was recently transported from another system, there may have been issues during the transport process.
  Namespace Issues: The namespace of the proxy interface may not match the expected namespace for the proxy class.
  Authorization Issues: The user may not have the necessary authorizations to access the proxy class.
  
  
  Solution:
  
  
  Generate Proxy Classes: 
  
  Go to the