A testmachine communicate with an MQTT broker by TCP/IP . When i open the Labview VI first and run it once i can run it afterwards without any problems and call it from Teststand. When i open Teststand first and Run the same VI out of Teststand i get always an TCP/IP error Error 62 or 56. When i hit just the edit Vi button in teststand and run it afterwards it seems to run fine. As a fix for the moment i put that VI in autostart and automatically run it by opening. But this is no propper solution. Once the programms are closed the problem appiers again.