Hi, Try executing mono like this:
MONO_INLINE_LIMIT=0 mono --debug yourapp.exe This will get a better stack trace (the line numbers are off, most likely due to inlining). Rolf > -----Original Message----- > From: [email protected] [mailto:mono-vb- > [email protected]] On Behalf Of Easy_Rider9999 > Sent: domingo, 17 de mayo de 2009 13:53 > To: [email protected] > Subject: [mono-vb] System.NullReferenceException: Object reference not > set to an instance of an object at > System.Windows.Forms.TreeView.MouseMoveHandler when dragging a node in > a treeview > > > I am always getting this error, when dragging a node in my treeview. I > reported this error to Novell, but they say, that they can't reproduce > it. I > get this Error with Mono 2.4 (both windows and Ubuntu 8.04). Is anybody > there that can reproduce this error? You can get my application at > https://sourceforge.net/project/showfiles.php?group_id=257087&package_i > d=315752&release_id=675230 > > This is the Error message: > > System.NullReferenceException: Object reference not set to an instance > of an > obj > ect > at System.Windows.Forms.TreeView.MouseMoveHandler (System.Object > sender, > Syste > m.Windows.Forms.MouseEventArgs e) [0x0015a] in > C:\cygwin\tmp\monobuild\build\BUI > LD\mono- > 2.4\mcs\class\Managed.Windows.Forms\System.Windows.Forms\TreeView.cs:22 > 3 > 0 > at (wrapper delegate-invoke) > System.Windows.Forms.MouseEventHandler:invoke_voi > d__this___object_MouseEventArgs > (object,System.Windows.Forms.MouseEventArgs) > at System.Windows.Forms.Control.OnMouseMove > (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:6382 > at System.Windows.Forms.Control.WmMouseMove > (System.Windows.Forms.Message& > m) > [0x00064] in > C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Wind > ows.Forms\System.Windows.Forms\Control.cs:5783 > at System.Windows.Forms.Control.WndProc > (System.Windows.Forms.Message& m) > [0x0 > 01d4] in > C:\cygwin\tmp\monobuild\build\BUILD\mono-2.4\mcs\class\Managed.Windows. > Forms\System.Windows.Forms\Control.cs:5387 > 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.tvMed_BeforeSelect Start > frmMain.Form_Activate Start > > Regards > > Hans > -- > View this message in context: > http://www.nabble.com/System.NullReferenceException%3A-Object- > reference-not-set-to-an-instance-of-an-object---at- > System.Windows.Forms.TreeView.MouseMoveHandler-when-dragging-a-node-in- > a-treeview-tp23582605p23582605.html > Sent from the Mono - VB mailing list archive at Nabble.com. > > _______________________________________________ > Mono-vb mailing list > [email protected] > http://lists.ximian.com/mailman/listinfo/mono-vb _______________________________________________ Mono-vb mailing list [email protected] http://lists.ximian.com/mailman/listinfo/mono-vb
