In config.h
// This option prevents a single extrusion longer than EXTRUDE_MAXLENGTH.
// Note that for Bowden Extruders a too-small value here may prevent loading.
#define PREVENT_LENGTHY_EXTRUDE
#define EXTRUDE_MAXLENGTH 200
// This option prevents a single extrusion longer than EXTRUDE_MAXLENGTH.
// Note that for Bowden Extruders a too-small value here may prevent loading.
#define PREVENT_LENGTHY_EXTRUDE
#define EXTRUDE_MAXLENGTH 200