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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0016 - Interchange method '&' is not supported for asynchronous RFC ?

  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 function module's attributes in the SAP system.
  Use Synchronous RFC: If the method is not compatible with asynchronous RFC, consider using synchronous RFC instead. This can be done by changing the call from an asynchronous to a synchronous call.
  Modify the Method: If you have control over the method, consider modifying it to support asynchronous calls if that is feasible and appropriate for your use case.
  Review RFC Destination: Ensure that the RFC destination is correctly configured and that it supports the type of call you are trying to make.
  Consult Documentation: Refer to SAP documentation or help resources for more details on the specific function module and its capabilities.
  
  Related Information:
  
  Asynchronous RFC: Asynchronous RFC allows for non-blocking calls, meaning the calling program does not wait for a response from the called program. This is useful for processes that can run independently.
  Synchronous RFC: In contrast, synchronous RFC requires the calling program to wait for the response, making it suitable for operations that need immediate feedback.
  Function Module Attributes: You can check the attributes of a function module in transaction SE37 or SE80 to see if it is designed for asynchronous calls.
  
  If you continue to face issues, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance based on your specific environment and requirements.