Func archiveDir($dir)

    ; Get all the files under the current dir
    $allOfDir = _FileListToArray($dir)
    Local $countDirs = 0
    Local $countFiles = 0

    $imax = UBound($allOfDir)
    For $i = 0 to $imax - 1
        If StringInStr(FileGetAttrib($allOfDir[$i]),"D") Then
            $countDirs = $countDirs + 1
        Else
            $countFiles = $countFiles + 1
        EndIf   
    Next

    Local $allDirs[$countDirs]
    Local $allFiles[$countFiles]

The error text is : "Array variable subscript badly formatted." and comes on this line:

Local $allDirs[$countDirs]

Any ideas?