I am using a Wanhao Duplicator i3 v2.1 with Cura V15.04.5. When I save the tool path to the SD card and try to print the file, the printer does not recognize or heat the extruder to the set temperature, but it does recognize and heat up the bed. If I re-save the file multiple times (trying in the printer each time) it will eventually work. This problem is very annoying, and I would like to find a solution. The firmware does not allow you to save a custom extruder temperature, and I do not want to have to set the extruder each time I print.