How To Fix E0016 - Interchange method '&' is not supported for asynchronous RFC

E0016 - Overview

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 016

• Message text: Interchange method '&' is not supported for asynchronous RFC

What causes this issue?

Only interchange method 'A' is currently supported for the asynchronous
RFC interface.

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?

Error message extract from SAP system. Copyright SAP SE.

E0016 - Details

• The SAP error message E0016, which states "Interchange method '&' is not supported for asynchronous RFC," typically occurs when there is an attempt to use an interchange method that is not compatible with asynchronous Remote Function Call (RFC) in SAP.
  
  Cause:
  
  Incompatible Method: The method you are trying to call asynchronously is not designed to support asynchronous RFC. This can happen if the method is defined in a way that requires synchronous processing or if it has certain characteristics (like returning a value) that are not compatible with asynchronous calls.
  
  Configuration Issues: There may be configuration issues in the RFC destination or the way the function module is defined.
  Incorrect Usage: The function module might be incorrectly invoked in a context that expects asynchronous behavior.
  
  
  Solution:
  
  Check Function Module: Review the function module or method you are trying to call. Ensure that it is designed to be called asynchronously. You can do this by checking the