Vision builder stop responding/hangs after calling a "vi" that contains a while loop and a event structure inside. The event structure has a timeout of 130ms and an event handler of "Value change" which is connected from an string control, what i'm trying to do is to prevent that the user can introduce a password with the keyboard. He can only scan the password via a usb scanner. The VI runs properly if I run it inside the Labview environment, but when I try to call it from Vision Builder, it hangs and does not respond to anything. Some advise to solve this issue?. Thanks in advance!