The Romi template is really nice for training purposes.
Suggest exposing the IP address of the target Romi (or simulator) by adding a control to the front panel of Robot Main and using this to construct the full destination URL.
(Off topic, for training, we created separate simulated romi LabVIEW project that this project communicates with to drive the robot around a virtual field. It simulates drive motors, encoders, gyro, LEDs, and switches.)
Attached is the changed robot main vi
.