[mono-vb] Running VB-Applications compiled with VB.NET (Express Edition) causes many crashes!

[Easy_Rider9999]

How can I get the line of code with the Error. I have made a version of my
program for Mono, but I have many crashes, but I often don't find the
crashes, because there is no debug information in the Mono-Error Message (I
started with option --debug!).

Regards 

Hans

Here is my latest Error Message:

frmMain.initTreeview oldkeyensurevisible
frmMain.tvMed_AfterExpand Start
frmMain.tvMed_AfterExpand Expand Data
Source=G:\Repetit.Net.T.SQLITE\bin\Datenba
nk\RepLite.sqlite;Version=3;
Init Treeview lasted: 0,150000000001455 Seconds!
frmMain.tvMed_BeforeSelect Start
frmMain.Form_Activate Start
frmSymptome AutoSelect InitTreeview frmMain BySQL finished
frmSymptome AutoSelect finished
frmSymptome.tvSympt_AfterCheck Finished
System.NullReferenceException: Object reference not set to an instance of an
obj
ect
  at System.Windows.Forms.TreeNode.set_Checked (Boolean value) [0x00066] in
C:\c
ygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows.Forms\System.
Windows.Forms\TreeNode.cs:319
  at (wrapper remoting-invoke-with-check)
System.Windows.Forms.TreeNode:set_Chec
ked (bool)
  at System.Windows.Forms.TreeView.MouseDownHandler (System.Object sender,
Syste
m.Windows.Forms.MouseEventArgs e) [0x0009a] in
C:\cygwin\tmp\monobuild\build\BUI
LD\mono-2.4\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TreeView.cs:210
1
  at (wrapper delegate-invoke)
System.Windows.Forms.MouseEventHandler:invoke_voi
d__this___object_MouseEventArgs (object,System.Windows.Forms.MouseEventArgs)
  at System.Windows.Forms.Control.OnMouseDown
(System.Windows.Forms.MouseEventAr
gs e) [0x0001c] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Manage
d.Windows.Forms\System.Windows.Forms\Control.cs:6354
  at System.Windows.Forms.Control.WmLButtonDown
(System.Windows.Forms.Message& m
) [0x0004f] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Wi
ndows.Forms\System.Windows.Forms\Control.cs:5620
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m)
[0x0
0184] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows.
Forms\System.Windows.Forms\Control.cs:5337
  at System.Windows.Forms.TreeView.WndProc (System.Windows.Forms.Message& m)
[0x
0006b] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows
.Forms\System.Windows.Forms\TreeView.cs:1198
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage
(System.Windows.
Forms.Message& m) [0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\
class\Managed.Windows.Forms\System.Windows.Forms\Control.cs:234
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc
(System.Windows.Fo
rms.Message& m) [0x00000] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\cl
ass\Managed.Windows.Forms\System.Windows.Forms\Control.cs:215
  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr
wPa
ram, IntPtr lParam) [0x00085] in
C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mc
s\class\Managed.Windows.Forms\System.Windows.Forms\NativeWindow.cs:242
frmMain.Form_Activate Start
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