New Post: Tiles.Prefetch() broken?

Hi,

I'm using MapWinGIS in an MS Access Application and trying to prefetch the tiles for a given region for all defined zoom levels.
The code is pretty simple:

'--- Getting the boundary into
'--- dblLongMax / dblLongMin
'--- dblLatMax / dblLatMin
MapMain.ProjToDegrees shpFile.Extents.xMax, shpFile.Extents.yMax, dblLongMax, dblLatMax
MapMain.ProjToDegrees shpFile.Extents.xMin, shpFile.Extents.yMin, dblLongMin, dblLatMin

'---- Initialize the StopInterface-Class
Set clsStopFunction = New StopInterface
clsStopFunction.Starten

'--- prefetching...
For intZoomRunner = intWMST_Min_Zoomlevel To intWMST_Max_Zoomlevel
     lngResult = Me.MapMain.Tiles.Prefetch(dblYMin, dblYMax, dblXMin, dblXMax, intZoomRunner, lngWMST_CUSTOM_PROVIDER_ID, clsStopFunction)
next

'--------------------------------

My StopInterface-Class Definition looks like:
----------------------------------------------------
Option Compare Database
Option Explicit

Implements MapWinGIS.IStopExecution

Dim m_bolStop As Boolean

Private Sub Class_Initialize()
    m_bolStop = True
End Sub

Private Sub Class_Terminate()
    m_bolStop = True
End Sub

Private Function IStopExecution_StopFunction() As Boolean
    IStopExecution_StopFunction = m_bolStop
End Function

Public Property Get doStop() As Boolean
    doStop = m_bolStop
End Property

Public Property Let doStop(ByVal bolWert As Boolean)
    m_bolStop = bolWert
End Property

Public Sub Stoppen()
    m_bolStop = True
End Sub

Public Sub Starten()
    m_bolStop = False
End Sub
--------------------------------------------

---

This worked more or less for 4.9.3.5 but after upgrading to 4.9.3.6 it get an error message saying:

Assertion failed: Invalid reference count for a tile

and at the third or fourth time when it hits the loop, MS access crashes completely.
This happens, independent of the zoomlevel (1 - 19) you enter.

Since there is no interaction to the tile reference count, - I'm stuck.

Any ideas what I'm doing wrong, or is this method simply broken in the current release?

Thanks in advance