Hi. I am wondering if anyone has tested VISA 3.1 with regards to recieving USB inerrupt data? My RAW device is enumerated correctly and I can read the status correctly. The problem is that VISA doesn't always detect the interrupts.... That is, some sessions work fine, and the next time I connect the device VISA can't detect the interrupt. Since no change has been made to my device from time to time, I was wondering if there still might be a bug in VISA 3.1? (I hope not.. but I'm just so frustrated..)