Also, you should try reseting it from Measurement and Automation
Explorer (MAX), it will be making the same driver calls, but might give
us some insight as to whether the issue is with CVI or the DAQ
hardware. In MAX the reset option can be found by opening the Devices
and Interfaces tab, then under the DAQmx Devices right click on your
card and Reset device will be one of your options. Give those things a
shot and let me know how it goes.