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!

Just replace my example's simple string control with VIs to read a string from a scanner so you can compare that string against expected values. Just make sure you aren't calling it in a loop that may never end.

Machine Vision

Vision builder does not responding after calling a "VI" that contains a while loop

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Hi, Brad,

Thanks very much for your support I think with a little modification your suggestion should work.

Regards,

Jose

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Machine Vision

Vision builder does not responding after calling a "VI" that contains a while loop

Re: Vision builder does not responding after calling a "VI" that contains a while loop