Report USB Bulk w/VISA in Hardware Posted February 22, 2009 QUOTE (andymatter @ Feb 20 2009, 01:33 PM) It sounds like something is causing VISA to reset EP4. You *should* be able to request data from the endpoint at this time, so it sounds weird to me that transfers won't work. That's what I'm thinking. For some reason I'm seeing these odd HALT_ENDPOINT control msgs sent instead of the Bulk-In reads that I'm commanding from LabVIEW. QUOTE (andymatter @ Feb 20 2009, 01:33 PM) Have you tried opening duplicate VISA sessions, each dedicated to a single endpoint instead of switching between each of them in one session? Tried that today actually. Still the same problem. I'm actually forced to pursue other methods of Bulk transfers using a .NET driver I had lying around. It won't be easy to get it to fit my needs, but so far I'm getting nowhere with the native LabVIEW USB read/writes on more than one endpoint. Thanks for your comments!