I have a version 8.1 system trying to communicate as a client to a version 7.1 server.
I/O is coming through just fine, but the trends and alarms are not.
Can ping the legacy ports, not the newer version ones (example - on the trend server, I can ping 2077, but not 2080)
However, if I change the port number on the project to the legacy port, it will not compile, since they are reserved port numbers.
Changing the "Earliest Legacy Version" in the Citect.ini file doesn't change things.
Any suggestions?