printf okay strcpy with cName_pt segment fault

[Ian Chapman <ichapman videotron ca>]

void
on_filechooserwidget2_selection_changed(GtkFileChooser *fs) {
        printf("\n Selection changed. \n");
        char    *cName_pt;
        cName_pt = gtk_file_chooser_get_uri(GTK_FILE_CHOOSER(fs));
        printf("\n cName_pt =  %s .\n", cName_pt);    //Prints selected 
file okay.
//      strcpy(fileselected, cName_pt);    //This gives segment fault?
        strcpy(fileselected, test_pt);    //This works okay, test=1234 
passed to high level.
        return;
Hi All,
    I do not understand why I'm getting a segment fault from strcpy 
using cName_pt in the above code.  I can printf using cName_pt and it 
prints the file that I selected using the glade gtkfilechooserwidget.  I 
must be doing something silly, I hope that someone can see what it is?  
Regards Ian.