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<H1>[Gtk-sharp-list] General Question
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<B>John Luke
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<A HREF="mailto:jluke%40cfl.rr.com"
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TITLE="[Gtk-sharp-list] General Question">jluke@cfl.rr.com
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<I>27 Jul 2003 14:24:49 -0400</I>
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<PRE>On Sun, 2003-07-27 at 02:17, Todd Berman wrote:
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><i> I am in the middle of writing a gtk# app, and I have a CheckButton that
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</I>><i> calls a function when toggled. Now, when the CheckButton is hit I get
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</I>><i> the following exception:
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</I>><i>
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</I>><i> Unhandled Exception: System.NullReferenceException: A null value was
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</I>><i> found where an object instance was required
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</I>><i> in (unmanaged) 06 GLib.Object:g_object_unref (intptr)
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</I>><i> in <0x00004> 06 GLib.Object:g_object_unref (intptr)
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</I>><i> in <0x00030> 00 GLib.Object:Unref ()
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</I>><i> in <0x00148> 00 GLib.Object:PerformQueuedUnrefs ()
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</I>><i> in <0x0001b> 05 GLib.Object:PerformQueuedUnrefs ()
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</I>><i> in (unmanaged) 06 Gtk.Application:gtk_main ()
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</I>><i> in <0x00004> 06 Gtk.Application:gtk_main ()
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</I>><i> in <0x00007> 00 Gtk.Application:Run ()
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</I>><i> in <0x0029d> 00 SevenL.GypsyShell.Gypsy:.ctor ()
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</I>><i> in <0x00025> 00 SevenL.GypsyShell.Gypsy:Main (string[])
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</I>><i>
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</I>><i>
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</I>><i> This seems to occur only when I execute calls to a web service when it
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</I>><i> is toggled.
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</I>><i>
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</I>><i> Any idea or pointers would be greatly appreciated.
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</I>><i>
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</I>><i> --Todd
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</I>Would it be possible to extract out a small test case from your code
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that causes this to happen, that way we can get some context of what is
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going on. By the way, I just added a small example to Monodoc for
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CheckButton, but my guess is the error is coming from somewhere else.
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