Pete,
Since TDS3014B is a very new instrument, National Instrument still didn't evaluate all of its functionalities. We will look into this and decide whether we will make a new driver.
In the meantime, you may try un-checking the ID querying, so that the VI will not look for only 3014B.
You may also contact Tektronix and see if they can provide you with the information on what they changed in this new series and if they have a driver and VIs for the new instrument.
Sorry for the inconvenience.
Zvezdana S.
National Instruments