You could use a send shape right after the send shape that sends shape that sends the file. For error handling u could use scope and excecption handler, the communication is sync so this should solve the problem unless u think otherwise.
Correct me if I am wrong, but I believe you would want to turn DeliveryNotification=transmitted, on the logical send port for the file to be sent, if you use this pattern.
Another option would be to use BAM…but that is something you probably do not want to explore unless you have the infrastructure already set up. Mahesh's suggestion is probably a better alternative.