I'm trying to remotely control a Keysight 34461A DMM using the instrument driver located here:
http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=21589
This instrument driver works like a charm when the DMM is connected via GPIB, but it errors out when it is connected via USB. I've isolated the problem to "Default Instrument Setup.vi". When this VI is called in the USB case, the instrument is left in a state that results in a timeout of any subsequent call to VISA Read. The only way I've found to get the instrument talking again after this error condition occurs is a power cycle. I have another 34461A exhibiting the same behavior, so it is unlikely to be a hardware issue. I can run the example "Agilent 3446X Series Acquire Single.vi" successfully over USB if I remove any calls to "Default Instrument Setup.vi".
Has anyone else experienced this or a similar issue?
I'm using Windows 7, LabVIEW 2014 SP1, NI-VISA 14.0.1, and the GPIB-USB-HS+ (NI-488.2 14.0) when operating over GPIB.