TCP Port question

["John R. Smith, Jr." <smith5646midrange@xxxxxxxxx>]

I have a client that is running a client server system where the iSeries is
a client.  When they try to start the job on the iSeries, they are getting a
failure trying to access the specified port.  It is my understanding that
the package previously worked and when they did an IPL, it stopped working.
There were supposedly no other configuration changes to the iSeries or the
network.  That sounds really strange to me.  Unfortunately, at this time I
only have a message that the connection failed.  I don't know if it was the
open or the bind or something else that it didn't like.  We are adding some
additional logging to the program to try to be a better message than
"connection failed".

 

In the meantime, I had them do a NETSTAT option 3 and F14 to see the ports
and they said the port in question does not show anything using it.  Is
there anything else that anyone can suggest to look at that might show me
what is causing the failure?