ARRAY index problem. Array can only be selected using an integer index

Question

Hi, I am trying to pass a file name to a store procedure from a lookup into a ForEach.

But I am getting the following error
The expression 'activity('LookupRes').output.value[variables('i')]' cannot be evaluated because property '4' cannot be selected. Array elements can only be selected using an integer index.

in my SP I have an expression as
@activity('LookupRes').output.value[variables('i')]

Increment J = @ hide (add(int(variables('i')), 1))

Set I = @variables('j')

That is how I am trying to get the index for my lookup
@activity('LookupRes').output.value[variables('i')]

But its not working.

Any suggestions?

Thanks

Answer 1

@Anonymous Thanks for using Microsoft Q&A.
Have you defined the variable "i" as a string ? Please try casting your variable to int in your activity e.g. @activity('LookupRes').output.value[int(variables('i'))].