iOS Question EXC_CRASH (SIGABRT) or EXC_BAD_ACCESS

Private Sub FillCronoTimer(Timerlist As List, IsListChanged As Boolean)
    Dim racetime1 As RaceProperty
    Dim pnl As Panel
    
    ClvIndex = ClvIndex + 1 'global int variable
    Dim MyIndex As Int = ClvIndex
    
    scvCronoTimer.Panel.Height = 0
    scvCronoTimer.Panel.RemoveAllViews

    ShowProgressBar(True, 0)
        
    For i = 0 To Timerlist.Size -1
        racetime1 = Timerlist.get(i)

        ...

        AddCronoTimer(racetime1,False)
        
        If Timerlist.Size > 10 And (i Mod 4) = 0 Then
            ShowProgressBar(True, i / Timerlist.Size)
            Sleep(0)
        End If

        If MyIndex <> ClvIndex Then Return
    Next

    ColorAllPanel
    
    For i = 0 To scvCronoTimer.Panel.NumberOfViews - 1
        pnl = scvCronoTimer.Panel.GetView(i)

        Racetime = pnl.Tag
        If Racetime.Visible Then
            Dim tbtn As fsToggleButton = pnl.GetView(13).Tag
            tbtn.Checked = Racetime.Checked
        End If
    Next

    'Keine Änderung bis jetzt
    Starter.IsListCronoTimerChanged = IsListChanged
    
    ShowProgressBar(False, 0)
End Sub

#Region ProgressBar
Private Sub ShowProgressBar(Visible As Boolean, Value As Double)
    pnlProgressBar.BringToFront
    pnlProgressBar.Visible = Visible
    lblProgress.Width = Value * (ProgressBar.Width - 2dip)
End Sub

Private Sub pnlProgressBar_Click
    'Platzhalter
End Sub
#End Region

Private Sub FillCronoTimer(Timerlist As List, IsListChanged As Boolean)
 If FillCronoTimerRunning Then Return
 FillCronoTimerRunning = True
..


FillCronoTimerRunning = False
End Sub