[RESOLVED] I cant seem to find the problem (ByRef argument type mismatch)

[Tontow]

It could be that I'm no good with types,but I cant seem to find the problem.

Public Sub DrawArrows()
'Start drawing arrows
Dim ArrowXY(0) As String
For I = LBound(DisplayTree()) To UBound(DisplayTree())
    If DisplayTree(I).Pre <> "" Then
        ReDim Preserve ArrowXY(ubound(GetReq(I))) As String 'Right here is where I get the error
        ArrowXY() = GetReq(I)
        For II = LBound(ArrowXY()) To UBound(ArrowXY())
            Call ArrowTip(Form1.Img1(ArrowXY(II)).Left, Form1.Img1(ArrowXY(II)).Height, Form1.Img1(I).Left, Form1.Img1(I).Height)
        Next II
    End If
Next I
End Sub
 
 
 
Public Function GetReq(ObjID As String) As String()
'returns all of an objects requirments
Dim DisDef() As String
Dim DisPre() As String
Dim MyReturn(0) As String
 
 
DisPre() = Split(DisplayTree(ObjID).Pre, " ")
For I = LBound(DisplayTree()) To UBound(DisplayTree())
    ReDim DisDef(Split(DisplayTree(ObjID).Def, " ")) As String
    DisDef() = Split(DisplayTree(ObjID).Def, " ")
    
    For II = LBound(DisDef()) To UBound(DisDef())
        For III = LBound(DisPre()) To UBound(DisPre())
            If DisDef(II) = DisPre(III) Then 'found match, return index
                MyReturn(UBound(MyReturn())) = I
                ReDim Preserve MyReturn(UBound(MyReturn()) + 1) As String
                Exit For
            End If
        Next III
    Next II
Next I
ReDim Preserve MyReturn(UBound(MyReturn()) - 1) As String
 
 
MsgBox (Join(MyReturn(), " "))
'ReDim Preserve GetReq(UBound(MyReturn())) As String
GetReq() = MyReturn()
 
End Function
Public Sub ArrowTip(x1, y1, x2, y2, Index)
If Index <> 0 Then
Load Form1.Lin1(Index)
Load Form1.Lin1a(Index)
Load Form1.Lin1b(Index)
End If
 
    p1 = 0: q2 = 1: p2 = Form1.Width: q1 = Form1.Height
    arrow_length = 30   '0.01 * 1 * Form1.Width
    beta = 30 * PI / 180
    Form1.Lin1(Index).x1 = x1
    Form1.Lin1(Index).y1 = y1
    Form1.Lin1(Index).x2 = x2
    Form1.Lin1(Index).y2 = y2
    Dim salfa As Single, calfa As Single, vector As Single
    Dim cth1 As Single, sth1 As Single
    Dim cth2 As Single, sth2 As Single
    Dim v1 As Single, w1 As Single, v2 As Single, w2 As Single
    Dim xab1 As Single, yab1 As Single, xab2 As Single, yab2 As Single
    Dim vab1 As Single, wab1 As Single, vab2 As Single, wab2 As Single
    'Arrow's main line in "absolute" coordinates
    xab1 = Form1.Width * (x1 - p1) / (p2 - p1)
    yab1 = Form1.Height * (y1 - q1) / (q2 - q1)
    xab2 = Form1.Width * (x2 - p1) / (p2 - p1)
    yab2 = Form1.Height * (y2 - q1) / (q2 - q1)
    'Length of the arrow's main body
    vector = Sqr((xab2 - xab1) * (xab2 - xab1) + (yab2 - yab1) * (yab2 - yab1))
    'Cos(alpha) and Sin(alpha):
    calfa = (xab2 - xab1) / vector
    salfa = (yab2 - yab1) / vector
    'Sin & Cos of the angles between the 2 arrow tips and the x axis
    'th1 = alpha - beta
    'th2 = alpha + beta
    cth1 = calfa * Cos(beta) + salfa * Sin(beta)
    sth1 = salfa * Cos(beta) - calfa * Sin(beta)
    cth2 = calfa * Cos(beta) - salfa * Sin(beta)
    sth2 = salfa * Cos(beta) + calfa * Sin(beta)
    'Arrow tips positions in "absolute" coordinates
    vab1 = xab2 - arrow_length * cth1
    wab1 = yab2 - arrow_length * sth1
    vab2 = xab2 - arrow_length * cth2
    wab2 = yab2 - arrow_length * sth2
    'Back to user coordinates
    v1 = p1 + vab1 * (p2 - p1) / Form1.Width
    w1 = q1 + wab1 * (q2 - q1) / Form1.Height
    v2 = p1 + vab2 * (p2 - p1) / Form1.Width
    w2 = q1 + wab2 * (q2 - q1) / Form1.Height
    Form1.Lin1a(Index).x1 = x2
    Form1.Lin1a(Index).y1 = y2
    Form1.Lin1a(Index).x2 = v1
    Form1.Lin1a(Index).y2 = w1
    Form1.Lin1b(Index).x1 = x2
    Form1.Lin1b(Index).y1 = y2
    Form1.Lin1b(Index).x2 = v2
    Form1.Lin1b(Index).y2 = w2
End Sub