I've just tried installing PyDAQmx on Python 2.7.16 (a new conda 2.7 environment) using pip and it is not installing correctly (on Windows 10 anyway).
It seems to be installing into site-packages/pydaqmx rather than site-package/PyDAQmx. This means that code using PyDAQmx obviously breaks as you can't import PyDAQmx. I tried import pydaqmx but this throws an Exception because it can't import Task.
PyDAQmx==1.4.1 works correctly, so hopefully it is easy to work out what caused this change!