Unresolved Software error when starting print

For some reason my printer will no longer start a print, it fails at the first move to position. The G-code is as follows:

<-ok
->N2 G21*24
<-ok
->N3 M107*38
<-ok
->N4 M190 S90*85
<-ok
->N5 M104 T0 S235*32
<-ok
->N6 T0*60
<-echo:Active Extruder: 0
<-ok
->N7 G28*20
<-ok
->N8 M114*47
<-X:120.00 Y:127.00 Z:0.00 E:0.00 Count X: 120.00 Y:127.00 Z:0.00
<-ok
->N9 M105*46
<-ok T:230.3 /235.0 B:89.5 /90.0 T0:230.3 /235.0 @:99 B@:127
->N10 G1 X120 Y127 Z5.18 F5000*20
<-Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
<-ok
->N11 M109 S235*92
<-T:229.5 E:0 W:?
<-T:228.7 E:0 W:?
<-T:228.3 E:0 W:?
<-T:227.8 E:0 W:?
<-T:227.4 E:0 W:10
<-T:227.4 E:0 W:10
<-T:227.4 E:0 W:10
<-T:227.6 E:0 W:10
<-T:227.1 E:0 W:10
->N1 M110 S1*96
->N2 G28 X0*89
->M84
->M104 T0 S0
->M140 S0
->M84
->M106 S0

I don't understand, what is it about this line that makes it have an error? "->N10 G1 X120 Y127 Z5.18 F5000*20" Everything else seems to be working fine, the xyz and extruder controls work fine until the printer has an error.

I've been working on the fixes recommended here to reduce z-axis ribbing and one of them was stopping the z-axis motors from disabling between layers, could this be related to that?

 

I think I might have solved my own problem, the left z-axis switch appeared to be one or two threads lower than the right, so the right switch would be on and the left off. I turned the threaded rod manually until the switch appeared to be in the same position as the right, and now it seems to be working!

 

Could you show a picture of how your switches are setup on your z axis