Oliver,
First, here is the set up.
1. Make sure that TCP/IP option for VI Server Configuration is checked. This will have to be done after tha application is built or by copying the LabVIEW INI file and making the needed changes.
2. Each application that you create should listen on a different port number. So, change one of the two executables to a different port number. This will have to be done after tha application is built or by copying the LabVIEW INI file and making the needed changes.
3. Place down an Open Application Reference function and place the new port number as one input and 127.0.0.1 for the IP Address/Machine Name input. If you do not have the 127.0.0.1 (localhost), then it tries to connect to itself, not the other application.
4. Place down a
n Open VI Reference and connect it to the Open Application Reference. Wire the name of the VI that you want to connect to into the VI Path input.
From here, you can call any method or property that you can normally in an executable. If you wish to call the Abort VI method, make sure that the VI can be aborted (change the VI Settings in the Application Builder).
Randy Hoskin
Application Engineer
National Instruments
http://www.ni.com/ask