gtk filechooser dialog error

[Nagaraja <nagaraja ncoretech com>]

Hi all,

I am running glade-3.6.7,  my gtk application  have main window  with 
buttons and  File Menu to  open and save a file .
I build it from glade file.  For  File/Open and  File/Save operation the 
filechooser dialog works fine  it brings up the file chooser dialog window
, where I can select the desired file or edit the defaut filename which 
appares in text entry of file save dialog.
Upon selecting or editing the default filename  the dialog disappears 
as expected and filename in gchar *filename.


The callback for menuitem to open/save    calls  open_dialog() and 
save_dialog() which return a gchar * pointer to the filename.

But what is hapennig is that am able  Open/Save  first time wihout any 
problem  but  if I try to open filechooser dialog window  again it is not
providing me  the filechooser dialog window any more. More over when I 
try to open second time it is giving the  below error.

Can any one here suggest  me how do I implement( Desing gtk GUI) gtk app 
for File Operation. your valuable suggest and help is greatly appriciated.


Thanks in advance.
Nagaraja.

Enter the file save
(recorder:3747): Gtk-CRITICAL **: gtk_widget_grab_default: assertion 
`GTK_WIDGET_CAN_DEFAULT (widget)' failed
FILE IS /root/oop.wav

Enter the file save
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkWindow'
(recorder:3514): Gtk-CRITICAL **: gtk_window_set_title: assertion 
`GTK_IS_WINDOW (window)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkFileChooser'
(recorder:3514): Gtk-CRITICAL **: 
gtk_file_chooser_set_do_overwrite_confirmation: assertion 
`GTK_IS_FILE_CHOOSER (chooser)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkFileChooser'
(recorder:3514): Gtk-CRITICAL **: gtk_file_chooser_set_current_folder: 
assertion `GTK_IS_FILE_CHOOSER (chooser)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkFileChooser'
(recorder:3514): Gtk-CRITICAL **: gtk_file_chooser_set_current_name: 
assertion `GTK_IS_FILE_CHOOSER (chooser)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkDialog'
(recorder:3514): Gtk-CRITICAL **: gtk_dialog_run: assertion 
`GTK_IS_DIALOG (dialog)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkWidget'
(recorder:3514): Gtk-CRITICAL **: gtk_widget_destroy: assertion 
`GTK_IS_WIDGET (widget)' failed

inside open
(recorder:3514): Gtk-CRITICAL **: gtk_widget_grab_default: assertion 
`GTK_WIDGET_CAN_DEFAULT (widget)' failed
The file name in open /root/001.wav
The Selected file in call back /root/001.wav
inside open
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkFileChooser'
(recorder:3514): Gtk-CRITICAL **: gtk_file_chooser_set_select_multiple: 
assertion `GTK_IS_FILE_CHOOSER (chooser)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkFileChooser'
(recorder:3514): Gtk-CRITICAL **: gtk_file_chooser_set_current_folder: 
assertion `GTK_IS_FILE_CHOOSER (chooser)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkDialog'
(recorder:3514): Gtk-CRITICAL **: gtk_dialog_run: assertion 
`GTK_IS_DIALOG (dialog)' failed
(recorder:3514): GLib-GObject-WARNING **: invalid uninstantiatable type 
`(null)' in cast to `GtkWidget'
(recorder:3514): Gtk-CRITICAL **: gtk_widget_destroy: assertion 
`GTK_IS_WIDGET (widget)' failed
The Selected file in call back (null)
(recorder:3514): GLib-CRITICAL **: g_stpcpy: assertion `src != NULL' failed