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UM3E reports print finished immediately but prints fine with USB

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UM3E reports "print finished" immediately when I print over network but of course prints nothing. I am using the latest Cura (2.5) and latest firmware ( The slicer says that my print will take 13h 35min but when I print to the printer over the network, the printer Active Print printing time says 00:00:00 and the printer says the print is done. I tried to un-install and reinstall Cura 2.5 but it makes no difference. I also switched to recommended settings and it made no difference. I went back to Cura 2.4 and it is printing fine. I also printed to a file and then copied to a USB stick. This also works fine. I'd say this is a bug!

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I've seen this a couple of times. Check and make sure that you have a file name in the bottom right corner of the screen where your STL file is, next to the pencil. I've highlighted it in green.


If the file name is missing from there, the printer will not be able to receive the print correctly and will think the print is immediately done.

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