[3ds Max] script vertex compare

Hi guys, I have made a script that is supposed to find the difference between the position of every vertex in a first mesh and a second mesh.

The goal is to automatically select for morpher the vertex that require vertex color to white and with a Ctrl+i the black vertex color.

Currently the script work with simple mesh like cube, but when I try with more complex mesh, it didn't work.
maybe it's because array are limited ?

Thx for your help.

1. sM1 = #()
   
2. sM2 = #()
3. cV1 = #()
4. cV2 = #()
5. aDV = #()
6. pCb1 = #()
7. pCb2 = #()
8. sPO1 = #()
9. sPO2 = #()
10. 
    
11. aDV as array
12. 
    
13. rollout pick_box_test "Pick Meshes"
14. (
15. pickbutton chooseit1 "Pick Mesh 1" width:140
16. on chooseit1 picked obj do
17. if obj != undefined do
18. (
19. sPO1 = obj.pos
20. obj.pos = [0,0,0]
21. chooseit1.text = obj.name
22. sM1 = obj
23. pCb1 = true
25. )
26. 
    
27. pickbutton chooseit2 "Pick Mesh 2" width:140
28. on chooseit2 picked obj do
29. if obj != undefined do
30. (
31. sPO2 = obj.pos
32. obj.pos = [0,0,0]
33. chooseit2.text = obj.name
34. sM2 = obj
35. pCb2 = true
36. if pCb1 and pCB2 do 
37. if sM1.verts.count == sM1.verts.count do
38. for i=1 to sM1.verts.count do
39. (
40. sM1.selectedVerts = #{i}
41. cV1 = sM1.verts[i].pos
42. cV2 = sM2.verts[i].pos
43. if cV1 != cV2 do appendIfUnique aDV i
44. )
45. sM1.pos = sPO1
46. sM2.pos = sPO2
47. sM1.selectedVerts = aDV
48. )
49. )
50. createDialog pick_box_test