Error -200122 Occurred At NI-9401 Test Panel

Updated Apr 9, 2019

Reported In


  • NI-9401


  • Measurement & Automation Explorer (MAX)

Issue Details

At Test Panel of NI-9401, when configuration 8 digital lines to be digital inputs and digital outputs, it returns an error:

Error -200122 occurred at Test Panel,

Possible Reason(s):

Lines 0 through 3 of this port are configured for input.
Cannot configure these line for output at this time.



The NI-9401 DIO channels are grouped in two ports, one containing channels 0, 1, 2, and 3, and one containing channels 4, 5, 6, and 7. You can independently configure each digital port in software for input or output. Note that all four channels in the port must share the same line direction.