I had to monitor a customer's voltage during a service call today and wanted to record it for an extended time while I checked some other things. Hooked everything up, got the message that my U1272A was connected on the laptop and the DMM showed remote status activated, but never got any readings to the laptop - nada, zilch, nic, tipota - no voltage readings, no log, no graphs, no nothing. Restarted laptop, restarted DMM, restarted software multiple times, looked like a newbie asshat in front of the customer. I was not a happy electrician. Needless to say, I can't charge anyone for that 30-45 min. spent putzing around with the meter and laptop.