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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0017 - Port type '&' not supported for asynchronous RFC ?

  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, change it to a supported type (e.g., TCP/IP).
  Save the changes and test the connection.
  
  
  
  Test the Connection:
  
  After making changes, use the "Connection Test" feature in SM59 to verify that the RFC destination is working correctly.
  
  
  
  Check for Network Issues:
  
  Ensure that there are no network issues preventing communication between the systems.
  Check firewall settings, network configurations, and ensure that the target system is reachable.
  
  
  
  Review Documentation:
  
  Consult SAP documentation or support for any specific requirements related to the RFC configuration for your version of SAP.
  
  
  
  Related Information:
  
  Asynchronous RFC (aRFC): This is a type of RFC that allows for non-blocking calls, meaning that the calling program can continue processing without waiting for the called program to finish.
  Transaction SM59: This transaction is used to manage RFC destinations in SAP. It allows you to create, modify, and test RFC connections.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues or provide additional guidance related to this error message.
  
  By following these steps, you should be able to resolve the E0017 error and ensure that your asynchronous RFC calls are functioning correctly.