
Check the tRFC Status
To check the status of tRFC calls select Tools
® ALE ® Administration ® Services ® Communication ® Transactional RFC ® Display incorrect calls. tRFC calls that connect IDocs use the function module INBOUND_IDOC_PROCESS in the receiving system. INBOUND_IDOC_PROCESS).If an IDoc in the sending system has been passed to tRFC (IDoc status "03"), but has not yet been input in the receiving system, this means that the tRFC call has not yet been executed.
The program RSARFCEX restarts unsuccessful tRFC calls.

You cannot choose the option is being executed in background processing.