how exactly do I export our configuration to a file?

You need to Telnet and authenticate to the UC500 and then type the following:

UC500>enable

UC500#debug ccsip messages 

SIP Call messages tracing is enabled

UC500#terminal monitor

Make the call and copy the output to a text file. then, disable the debug collection:

UC500#undebug all

Thanks,

Marcos

Thanks for the very quick response. We have a combined experience of over a century in this shop but I seem to be the one delegated to become our Cisco expert. I have attached the log although some of it seems truncated. It looks like the relevant stuff is there. I can send you a copy of our configuration file if that will help. Thanks again. Our president is breathing fire over this.

You should upgrade to the 7.1.3 software pack.  It will fix the issue.  The problem is...

You should disable the firewall, antivirus, and only have one NIC connected.  Without seeing the computer, I can't tell you want it doesn't like, but there might be something running on the tftp port.

Close CCA and run a netstat -an

Post the output here.

Also, can you capture a screen shot of the error?  I believe it will give multiple problems that you could be having, one being tftp. 

It has been suggested that we may have a bad sector in our flash drive. Is there a way to test for that? I have included the output of the netstat -an command. I don't see any open ports that would cause this. I have tried 3 different computers now with the same error. Never had this issue before.