How To Fix E0017 - Port type '&' not supported for asynchronous RFC

E0017 - Overview

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 017

• Message text: Port type '&' not supported for asynchronous RFC

What causes this issue?

Only port type '1' is currently supported for the asynchronous RFC
interface.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

E0017 - Details

• The SAP error message E0017, which states "Port type '&' not supported for asynchronous RFC," typically occurs when there is an issue with the configuration of the RFC (Remote Function Call) destination in SAP. This error indicates that the port type specified for the RFC destination is not compatible with asynchronous RFC calls.
  
  Cause:
  
  Incorrect Port Type: The port type defined in the RFC destination is not suitable for asynchronous communication. Asynchronous RFC requires specific port types, such as "T" (TCP/IP) or "D" (HTTP).
  
  Configuration Issues: The RFC destination may not be properly configured in transaction SM59.
  Network Issues: There may be network-related issues preventing the proper communication between the systems.
  
  
  Solution:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59.
  Locate the RFC destination that is causing the error.
  Check the "Technical Settings" of the RFC destination.
  Ensure that the "Port Type" is set to a compatible type for asynchronous RFC (e.g., TCP/IP).
  
  
  
  Change Port Type:
  
  If the port type is incorrect,