How To Fix WES_OUTBOUND015 - Error during proxy call (&1: &2, &3)

WES_OUTBOUND015 - Overview

• Message type: E = Error

• Message class: WES_OUTBOUND - Messages for Outbound Services

• Message number: 015

• Message text: Error during proxy call (&1: &2, &3)

What causes this issue?

An error occurred during the proxy call for the service.
The error text is:
Longtext:

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

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

WES_OUTBOUND015 - Details

• The SAP error message:
  WES_OUTBOUND015 Error during proxy call (&1: &2, &3)
  typically occurs in the context of SAP PI/PO (Process Integration/Process Orchestration) or SAP middleware scenarios where a proxy call from SAP to an external system or another SAP system fails.
  
  Cause
  This error indicates that an error occurred during the outbound proxy call. The placeholders (&1, &2, &3) provide specific details about the error:
  
  &1: The name of the proxy or interface.
  &2: The error message or error code returned.
  &3: Additional details or technical information about the error.
  
  Common causes include:
  
  Network or connectivity issues between the SAP system and the target system.
  Incorrect configuration of the communication channel or logical port.
  Authentication or authorization failures.
  Payload or message format issues.
  Runtime errors in the target system or adapter.
  Timeout or system unavailability.
  
  
  Solution
  To resolve the error, follow these steps:
  
  
  Check the Detailed Error Message:
  
  Look at the full error message with the placeholders replaced to understand the exact problem.
  Check the short dump (transaction