We just got our BB for our lab this past week. After running the calibration (the basic extruding test) that came on the SD card, I moved on to try printing Benchy from the SD. I select the file from the SD card, and nothing happens. At all. After doing a little searching I thought maybe OctoPi was interfering, so I unplugged it. Still nothing. So then I tried printing by uploading the file through OctoPi. Success! But ideally I would like to be able to print from SD as well as through the network. So any idea why prints from OctoPi work, but not from SD?