Function is only working for certain subranges? - vba

Question

Main point of this function is to return the most common movie genre.
Function MoviesByGenre(genreRng As Range) As String
Dim genreList(1 To 4) As String
Dim current As Integer
current = 1
For i = 1 To genreRng.count
Dim found As Integer
found = 0
For j = 1 To current
If genreList(j) = genreRng.Cells(i) Then
found = 1
Exit For
End If
Next j
If found = 0 Then
genreList(current) = genreRng.Cells(i)
current = current + 1
End If
Next i
Dim genreCount(1 To 4) As Integer
For i = 1 To 4
Dim count As Integer
count = 0
For j = 1 To genreRng.count
If genreRng.Cells(j) = genreList(i) Then
count = count + 1
End If
Next j
genreCount(i) = count
Next i
MoviesByGenre = FindMax(genreCount, genreList)
End Function
Now my FindMax function looks like this:
Function FindMax(valueArray, nameArray) As String
Dim max As Double
max = valueArray(LBound(valueArray))
For i = LBound(valueArray) + 1 To UBound(valueArray)
If valueArray(i) > valueArray(max) Then
max = i
End If
Next i
FindMax = nameArray(max)
End Function
FindMax appears to work well in other areas, but depending on the range I use for MoviesByGenre, it may or may not work. (sometimes it'll give me #VALUE!, other times it'll give me the actual most common movie genre, and i'm not sure why.) I'm using Excel 2016 for MacOS.

Answer 1

Do you mean something like that
Sub Test()
Dim a As Variant
a = Range("A1:A7").Value
MsgBox FindMax(a)
End Sub
Function FindMax(valueArray) As String
Dim max As Double
Dim i As Long
max = valueArray(LBound(valueArray), 1)
For i = LBound(valueArray) + 1 To UBound(valueArray)
If valueArray(i, 1) > max Then
max = valueArray(i, 1)
End If
Next i
FindMax = max
End Function