[edited from support email]
I am running DirectRT on two computers and I am trying to synchronize them by having one wait for a TTL signal from the other. The receiving machine waits for a "1" to be received but it locks up. I manage to see an error message on the screen which is attached. The message is reporting problems with something called NT Port Library (see attached image of the error: "Can't find valid registration information..."). Do you provide that library with your application or use it in any part of the program?