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Two VIs interfering with one another

One VI is for RTDs and pressure gauges.  Another VI is for flow meters.  If I were to run the RTD+pressure gauge VI alone, the values read correctly.  If the flow meter VI is run simultaneously with the RTD+pressure gauge VI, the values of the RTDs become innacurate after around 15-20 iterations every time.  What is causing an interference between the two?

 

Eight RTDs and two flow meters are on a LabJack U3.  The 2 pressure gauges and third flow meter are on a LabJack U6.

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You are using mostly third party labjack drivers and it is not clear how well they are written or called. Have you tried their support?

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