I have a form (Inwards) in which there is subform (remaining items on P.O).

forget count 0 plz

on count 1, subform add row i have populated count 0 data to subform which is working nicely

on 2nd count, subform add row i want to populate (remaining items on P.O) to same form.

i am using this script for 1st and 2nd count

2. if(Inwards[Purchase_Order_Number == input.Purchase_Order_Number && Field_field == "Open"].count() = 1 )
3. {
4. rec = inward_items_lookup[Inwards == input.Inward_Number];
5. i = 0;
6. a = List();
7. b = List:Int();
8. c = List:Int();
9. d = List:Int();
10. e = List:Int();
11. f = List:Int();
12. get_sf_values = Inwards[Inward_Number == Inward_Number].Items_Received;
13. for each  rec in get_sf_values
14. {
15. a.add(rec.Item4);
16. b.add(rec.UOM4);
17. c.add(rec.Rate_Unit4);
18. d.add(rec.Remaining_Quantity1);
19. e.add(rec.Department_and_cost_center);
20. f.add(rec.Job_ID);
21. }
22. for each  rec1 in Remaining_Items_on_P_O
23. {
24. if(a.size() > i)
25. {
26. rec1.Item9=a.get(i);
27. rec1.UOM9=b.get(i).toString();
28. rec1.Rate_Unit9=c.get(i);
29. rec1.Remaining_Quantity9=d.get(i);
30. rec1.Department_with_cost_centers9=e.get(i);
31. rec1.Job_ID=f.get(i);
32. }
33. i = i + 1;
34. }
35. }
36. if(Inwards[Purchase_Order_Number == input.Purchase_Order_Number].count() = 2)
37. {
38. rec3 = Remaining_items_inward_lookup_for_open_PO[Inwards == input.Inward_Number];
39. i = 0;
40. a = List();
41. b = List:Int();
42. c = List:Int();
43. d = List:Int();
44. e = List:Int();
45. f = List:Int();
46. get_sf_values = Inwards[Inward_Number == Inward_Number].Remaining_Items_on_P_O;
47. for each  rec3 in get_sf_values
48. {
49. a.add(rec3.Item9);
50. b.add(rec3.UOM9);
51. c.add(rec3.Rate_Unit9);
52. d.add(rec3.further_remaining);
53. e.add(rec3.Department_with_cost_centers9);
54. f.add(rec3.Job_ID);
55. }
56. for each  rec4 in Remaining_Items_on_P_O
57. {
58. if(a.size() > i)
59. {
60. rec4.Item9=a.get(i);
61. rec4.UOM9=b.get(i).toString();
62. rec4.Rate_Unit9=c.get(i);
63. rec4.Remaining_Quantity9=d.get(i);
64. rec4.Department_with_cost_centers9=e.get(i);
65. rec4.Job_ID=f.get(i);
66. }
67. i = i + 1;
68. }
69. }

there is an error on 2nd count saying  Error occurred while executing on add row script.

please help