There is a series of procs that you can put in place to insure that they get the messages. .
When you send a message and it goes ok use the the tps to save the message to a file for your. (save_ob_msg)
When you get the ACK back you need to delete the save message. Use kill_obsave for that
If you have a time out set to await replies then you will need to use the reply generation procedure to resend the message you did not get the ack for.(resend_obsave)
Plus in your case in the protocol startup you need to resend the message that you did not get the ack for. recover_state_14_31.
In the tcl library there is a post Recover_33 tha thas them I think tha is it.
I hope this helps I know it did not directly answer your questio but this is how to insure message get to the anacialy system.
