[Gtk-sharp-list] Exception in TimooutProxy.Handler

[Elmar Haneke]

What can raise this error?
It seems to happen on some Windows Machines:

Unhandled Exception:
System.NullReferenceException:
Object reference not set to an instance of an object
at (wrapper native-to-managed) TimeoutProxy.Handler () <0x00000>
at (wrapper managed-to-native) Gtk.Application.gtk_main () <0x00004>
at Gtk.Application.Run () <0x00007>
at DlgUtils.DlgTools.RunApplication () <0x00032>
at TurboPlaner.MainClass.Main (string[]) <0x0009a>