Hello all. I am using Cura 13.11.2 because it doesn't appear the interface in the newer versions for the USB connection with the printer is not as sophisticated (please set me strait if I am missing something). Anyway, when I am printing, I pause the print and manually lower the bed while I change filament. When I raise the bed back to its proper position and attempt to reengage the print sequence, sometimes it will just cancel the print and make me reconnect with the printer. Other times, it works just fine without any glitches. Any suggestions or ideas? Dave, what is your thought? FYI I am printing using USB, not ulticontroller. Thanks.