GLib-GObject-WARNING **: invalid cast from `GtkLabel' to `GtkFixed' while generating a dynamic GUI

["anne isac" <anneisac techie com>]

Hi
I'm new to Gtk.
I'm trying to create a screen dynamically.
The screen is to have frame with labels and comboboxes the number of witch is only known at run time.
My GtkFrame has a GtkFixed widget on to witch I place the GtkLabel and GtkComboBox.
when I execute the program some of the labels and comboboxes do not get displayed as I get an error message as 

(try:15287): GLib-GObject-WARNING **: invalid cast from `GtkLabel' to `GtkFixed' 
(try:15287): Gtk-CRITICAL **: file gtkfixed.c: line 188 (gtk_fixed_put): assertion `GTK_IS_FIXED (fixed)' failed

But this happens for the some particular positions in the list by which I populate the frame.
Could some one please tell me as to why only at some particular point I get this error when I'm able to populate the remaining frame by the same code.

I'd be really grateful if anyone could help me out.

here is my code:

   for (c = 0, option = group->options; c < group->num_options;
    c++, option++)
 {
   dynamicLabel[I] = gtk_label_new (option->keyword);
   gtk_widget_show (dynamicLabel[I]);
   gtk_fixed_put (GTK_FIXED (dynamicFixed[d]), dynamicLabel[I], 10, k);
   gtk_widget_set_size_request (dynamicLabel[I], 120, 26);
   gtk_label_set_line_wrap (GTK_LABEL (dynamicLabel[I]), TRUE);
   dynamicCombo[I] = gtk_combo_box_new_text ();
   gtk_widget_show (dynamicCombo[I]);
   gtk_fixed_put (GTK_FIXED (dynamicFixed[d]), dynamicCombo[I], 150,
    k);
   gtk_widget_set_size_request (dynamicCombo[I], 250, 26);
   gtk_container_set_border_width (GTK_CONTAINER (dynamicCombo[I]), 1);
   for (e = 0; e < option->num_choices; e++)
     {
         option->choices[e].text);
       gtk_combo_box_append_text (GTK_COMBO_BOX (dynamicCombo[I]),
      option->choices[e].text);
     }

   gtk_combo_box_set_active (GTK_COMBO_BOX (dynamicCombo[I]), 0);
   g_signal_connect (dynamicCombo[I], "changed",
       G_CALLBACK (on_combo_changed),
       GINT_TO_POINTER (I));
   I++;
   k = k + 40;
 }




Thanking you in anticipation.
Anne.
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