My friend Alex, stuck with the problem for a few days.
Everytime he insert to print, it shows on screen just like the figure below.
We have tried and test so many times. It turns out:
1.Definitely the printer is UM2E+, he choose the right version in Cura, and all things are updated both hardware&software.
2.The same STL file has sliced on my Cura and it works okay. That means the file is nothing wrong.
3.The same STL file has sliced on my Cura and he took it to print but failed. That means his printer is nothing wrong.
4.The Question is, anything sliced from his Cura, couldn’t be printed. But we have compared my settings and his setting, turning out nothing different.
By the way, he print by SD card all the time.
And the gcode prtscr I attach below. The left is mine, successful one. The right is his, failed one.
We definitely have no changed any settings but default.
Do you guys have any idea of it?