Mistype error message

I have a function which passes in three reference values
Private Function CommonRow(ByRef iArrayi()
As Long, _
ByRef iArrayj() As Long, _
ByRef iArrayk() As Long) As Long

Inside the function, I want to do a if...else
loop with condition like when iArrayi()doesn't exist, iArrayj() doesn't exist or iArrayk() doesn't exist

So I put

If Not iArrayi() Is Nothing Then

But I got an error message "Mistype" when I run the macro

Could someone please help me

Thanks in advance

[Damon Ostrander]

If you mean that you want to know if an array has been passed as an argument or not, the code should be:

Private Function CommonRow(Optional iArrayi()
As Long, _
iArrayj() As Long, _
iArrayk() As Long) As Long

and then you can test whether an array argument is missing:

If IsMissing(iArrayi) Then ...

I also eliminated the ByRef keywords because ByRef is the default for arrays.