Unable to populate values in list based on selection of another list value

[Khushbu Jowaheer]

Hello all,

I have 3 custom fields.

A(Select List)
B(Select List)
C(Cascading List)

When I select a value in A, it should populate some values in list for B. When a value in B is selected, it should populate some values in C.

I am using scriptrunner behaviour to write my scripts. But it works for one scenario,i.e., when I select a value in B, it populates values in C.

Please assist.

Thanks,
Khushbu

[Alexey Matveev]

Could you provide your script? What is the error?