Error -200220 occurred at DAQmx Create Channel

[Angio04]

Possible reason(s):

Measurements: Device identifier is invalid.

Device Specified: Dev1

Task Name: _unnamedTask<0>

Why? Please, help me.

[Sam_Sharp]

The error message is pretty clear: "Device identifier is invalid". Have you checked in MAX that you have a DAQmx device called 'Dev1' under 'Devices and Interfaces'?

If that doesn't solve it - you need to post a lot more information and your code.