After some more testing it appears that the connection is being dropped before I receive the ack message. See error log….
cac_out_3:06/10/2013 10:54:56] read returned error 73 (Connection reset by peer)
[pdl :PDL :ERR /0: cac_out_3:06/10/2013 10:54:56] PDL signaled exception: code 1, msg device error (remote side probably shut down)
Engine idle — 06/10/2013 10:55:11
The vendor is insisting that they are sending the ack but as I mentioned earlier I never see it. And they are not able to resend the ack.
Any suggestions for monitoring the port? Also, what may be the cause of the port to disconnect?
Thanks!