Forum Post: RE: How to resolve System.NullReferenceException when using filter in object explorer

I meant to give the exception details.  Sorry. System.NullReferenceException Object reference not set to an instance of an object. Stack Trace:   at Quest.Toad.DatabaseBrowser.ObjectPaletteControl.FilterContext_ContextChanging(Object sender, TrlContextChangedArgs args)   at Quest.Toad.Settings.TrlContextCollection.TrlContextChangedHandler.Invoke(Object sender, TrlContextChangedArgs args)   at Quest.Toad.Settings.TrlContextCollection.OnContextChanging(Object sender, TrlContextChangedArgs args)   at Quest.Toad.Settings.TrlContextCollection.set_Item(ITrl trl, Object value)   at Quest.Toad.Settings.FilterContextCollection.set_Item(ITrl trl, FilterInfo value)   at Quest.Toad.DatabaseBrowser.ObjectPaletteControl.set_CurrentCriteria(String value)   at Quest.Toad.DatabaseBrowser.ObjectPaletteControl.criteriaEdit_KeyPress(Object sender, KeyPressEventArgs e)   at System.Windows.Forms.Control.OnKeyPress(KeyPressEventArgs e)   at DevExpress.XtraEditors.BaseEdit.OnKeyPress(KeyPressEventArgs e)   at DevExpress.XtraEditors.TextEdit.OnMaskBox_KeyPress(Object sender, KeyPressEventArgs e)   at System.Windows.Forms.Control.OnKeyPress(KeyPressEventArgs e)   at DevExpress.XtraEditors.Mask.MaskBox.OnKeyPress(KeyPressEventArgs e)   at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)   at DevExpress.XtraEditors.Mask.MaskBox.ProcessKeyEventArgs(Message& m)   at System.Windows.Forms.Control.ProcessKeyMessage(Message& m)   at System.Windows.Forms.Control.WmKeyChar(Message& m)   at System.Windows.Forms.Control.WndProc(Message& m)   at System.Windows.Forms.TextBoxBase.WndProc(Message& m)   at System.Windows.Forms.TextBox.WndProc(Message& m)   at DevExpress.XtraEditors.Mask.MaskBox.BaseWndProc(Message& m)   at DevExpress.XtraEditors.Mask.MaskBox.MaskStrategy.SimpleStrategy.DoWndProc(Message& m)   at DevExpress.XtraEditors.Mask.MaskBox.WndProc(Message& m)   at DevExpress.XtraEditors.TextBoxMaskBox.WndProc(Message& msg)   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)