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I was also vexed by this problem. I couldn't connect to my printer with Pronterface while Cura was open unless I did a lot of unplugging of the USB cable and tried to connect before Cura got there. Turning off USB printing plugin in Marketplace did the trick. Thanks so much!
How do I turn off USB functions?
in UltiMaker Cura
Posted · Edited by DrBow
more specific
I was also vexed by this problem. I couldn't connect to my printer with Pronterface while Cura was open unless I did a lot of unplugging of the USB cable and tried to connect before Cura got there. Turning off USB printing plugin in Marketplace did the trick. Thanks so much!