The conversation enters SEND_ONLY state when an APPCCMD CONTROL=RECEIVE macroinstruction completes with the deallocate indicator in the What-Received field on. This indicates that the partner application has issued an APPCCMD CONTROL=DEALLOC, QUALIFY=FLUSH|DATAFLU. In this state, the application can continue to send information until ready to deallocate the conversation.

In general, the conversation is in SEND_ONLY state after successful completion of an APPCCMD CONTROL=RECEIVE macroinstruction and the deallocate indicator in the What-Received field is on.