I had that problem recently. I changed fill to 0% it printed right after that. no clue why. but it worked.
Post photos. I don't know if you modeled the cup as a cylinder and unchecked "top layer" or if you are modeling the width of the walls of the cup carefully? The first method works really well - espeically with a larger nozzle size.
Most likely you are doing #2 and need to uncheck all the "fix horrible" boxes as stated above.
thanks- never knew about the fix horrible boxes... will try that.
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neotko 1,417
Maybe the stl it's wrong. Try to fix it with netfabb cloud free system or check the fix settings of cura.
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