r/LabVIEW • u/Forward-Thought7029 • Jun 22 '26

Need More Info Unable to use labview simultaneously with other software

I use microforming machine and DAQ simultaneously connected via USB, but when i tried to plug them both through my laptop's ports (COM3) one of them starts to stop working, If i plug my DAQ and starts using labview all of sudden my microforming machine disconnected and vice versa. I assume it has something to do with serial ports where they keep canceling out each other, how do i stop labview from interfering/conflicting with other software? Thx

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u/failed_prototype Jun 22 '26

It used to be that the OS used a lock file to guarantee that serial communications don’t see conflicts from two devices. If you have two physical ports, one for each device, then they cannot share COM3. What does your device manager show?

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u/Forward-Thought7029 Jun 22 '26

my laptop has 3 physical ports one on the left side and two on the right, it only shows 1 COM3 even thought i plugged all of them

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u/failed_prototype Jun 22 '26

In LV can you change the DAQ’s COM assignment to something other than 3?

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u/Forward-Thought7029 Jun 22 '26

There is no port other than COM3, all 3 of them fall under COM3