DAQmx causes separate USB device to disconnect

[silverpanther]

We are encountering a strange problem where the DAQmx(6323) is causing a separate USB device to disconnect when writing a digital ouput value. After initializing the task, this statement

writer.WriteSingleSampleSingleLine(true, true); 

is causing the other device to disconnect/disappear in the device manager. Suspect a conflict on the PCI Bus? Any suggestions on where to dig to resolve?  

[amezam]

Hello Silverpanther,

Is this the first time it happens? What are the hardware and DAQmx drivers you’re using? Have you checked if the NI Device Loader service is started and set to automatic? (Navigate to Control Panel>>Administrative Tools>>Services). Do you see the hardware properly recognized in the Device Manager or with a yellow exclamation mark?

Best Regards,

Alina M

Applications Engineering

National Instruments

[Curt_C]

Hi,

I had a similar problem using a NI9234 compact daq device.

I connected the usb devices to a externally powered usb hub and that solved the problem

Curt