What are you trying to do? There are several ways of using TCP/IP to communicate between computers. Some use functions that explicitly manage the connections, and these typically have a Time-Out associated with them if they fail to connect. Other methods are a bit more "passive" (I'm thinking of Network Shared Variables), but there are usually ways to determine if "the other side" is listening.
To repeat, what are you trying to do? Do you have LabVIEW code that you are using, or trying to use? If so, we need to see it in order to make meaningful suggestions to you.
Bob Schor
