Adding an LCD to Ramps 1.4

I have recently built a Prusa i3 clone with the Ramps 1.4 board and I am trying to add an LCD...
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I am using the Marlin firmware, and have added the u8glib library to the arduino.cc software. I have uncommented the following line in Configuration.h

#define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER

however when I try to complie, I get an erro that says - 'min_software_endstops' was not declared in this scope

what does this mean and how do i fix it?

check these lines in config.h

// If enabled, axes won't move below MIN_POS in response to movement commands.
#define MIN_SOFTWARE_ENDSTOPS
// If enabled, axes won't move above MAX_POS in response to movement commands.
#define MAX_SOFTWARE_ENDSTOPS

Edited 1 time(s). Last edit at 08/27/2017 06:26AM by obewan.