You must create a Background Remote Function Call (bgRFC) destination for communications in an outbound queue or an inbound queue respectively.
To create a bgRFC destination for the outbound queue, proceed as follows:
In transaction SPRO open the SAP Reference IMG and navigate to: and click on the Activity icon.
In RFC Destination, enter IWFND_BGRFC_DEST.
In Connection Type, enter 3.
In Description 1, enter RFC Destination for Outbound Queues.
Choose Enter and then select the Special Options tab.
In the Select Transfer Protocol section, select the option Classic with bgRFC from the list and save your settings.
Accept the warning message with Yes.
Choose Connection test.
Information about the connection type displays.