Gtk-CRITICAL **: gtk_text_buffer_emit_insert: assertion `g_utf8_validate

[radone <debianuser seznam cz>]

I got this error message:
Gtk-CRITICAL **: gtk_text_buffer_emit_insert: assertion `g_utf8_validate (text, len, NULL)' failed
My code:

 
            ostringstream str;
            str << "SDES("<< source.getNetworkAddress() <<");\n";

            Glib::RefPtr refTextBuffer = notebook->textview_sdes->get_buffer();
            Gtk::TextBuffer::iterator iter = refTextBuffer->get_iter_at_offset(0);
            refTextBuffer->insert(iter, Glib::convert (str.str(), "UTF-8", "ISO8859-1"));

without Glib::convert (str.str(), "UTF-8", "ISO8859-1") - only with str.str() is emited the same error message. 
Could anyone help me?

---

View this message in context: Gtk-CRITICAL **: gtk_text_buffer_emit_insert: assertion `g_utf8_validate
Sent from the Gtkmm forum at Nabble.com.