Problem with auto rescale..

["Naveen Kumar" <naveen galieosoft com>]

Hi all,
      
  I am using gtkdatabox-0.7.0.0 to plot a graph, 
  1. when i use

   gtk_databox_graph_remove_all (box);
   gtk_databox_auto_rescale (GTK_DATABOX (box), 0.02);

   i am getting a warning as :
   ** (lt-grid:11340): WARNING **: Calculating extrema failed. Resorting to  
   default values
  
  please help me how i can remove this warning..

  Regards
  Naveen