Application.Index results in Compile Error: Type mismatch: Array or user-defined type expected

Question

I know this error pops up a lot on the forum, but none of the posts I have seen have the same issue. I get a compile error when trying to use the Application.Index function to slice a 2D array. I have used the function before for simple indexing but there are multiple examples on the web of slicing being done.

Below is the code. It always highlights ".index" and gives me the compile error. I have tried casting the array as double, integer, and variant but nothing works. Please help.

    Dim test_z(2, 2) As Double

     Dim new_z As Double

    'fill the text_z array with values

    test_z(0,0) = 1

    'etc....

    new_z = Application.index(test_z, 1, 0)

Answer 1

Index returns an array if you pass 0 as the last argument. You can't assign that to Double - maybe try

Dim new_z As Variant