EMC Hangs when loading this code????

(Process Variables) #11 = 5 (X Max) #12 = 4 (X Min) #19 = #11 (X Current Location - Start at Max) #21 = 4 (Y Max) #22 = 3 (Y Min) #23 = 0.2 (Y Step) #28 = [0 - #23] (Y Step with Direction - Start out Decrementing) #29 = #21 (Y Current Location - Start at Max) #31 = 1.2 (Z Max) #32 = 1 (Z Min) #33 = 0.05 (Z Step) #39 = #31 (Z Current Location - Start at Max) g0 x#19 y#29 z#39 (Set Starting Point) o1 while [ #39 GT #32 ] (Z loop steps down) g0 z#39 o5 if [#28 LT 0] (If step direction is down, step down. Else step up) o2 while [#29 GT #22] (Y loop steps down) g0 y#29 o3 if [#19 EQ #11 ] (X pass min to max to min) #19 = #12 o3 else #19 = #11 o3 endif g0 x#19 #29 = [#29 + #23] (Decrement Y) o2 endwhile o5 else o6 while [#29 LT #21] (Y loop steps up) g0 y#29 o7 if [#19 EQ #11 ] (X pass min to max to min) #19 = #12 o7 else #19 = #11 o7 endif g0 x#19 #29 = [#29 + #23] (Increment Y) o6 endwhile o5 endif #23 = [0 - #23] (Reverse Y Step Direction) #39 = [#39 - #33] (Decrement Z) o1 endwhile M2

(Process Variables) #11 = 5 (X Max) #12 = 4 (X Min) #19 = #11 (X Current Location - Start at Max) #21 = 4 (Y Max) #22 = 3 (Y Min) #23 = 0.2 (Y Step) #29 = #21 (Y Current Location - Start at Max) #31 = 1.2 (Z Max) #32 = 1 (Z Min) #33 = 0.05 (Z Step) #39 = #31 (Z Current Location - Start at Max) g0 x#19 y#29 z#39 (Set Starting Point) o2 while [#29 GT #22] (Y loop steps down) g0 y#29 #29 = [#29 - #23] (Decrement Y) o2 endwhile m2