Hi, I have been trying to figure this out for a few days now. All I am trying to do is decode a base64 string and add it to a Gtk::TextView. Below is the code: txtbuffer_ = Gtk::TextBuffer::create(); txtview_.set_buffer(txtbuffer_); const Glib::ustring str = Glib::Base64::decode("YmJi3A=="); txtbuffer_->set_text(str); When I run the program I get the error: Gtk-CRITICAL **: gtk_text_buffer_emit_insert: assertion 'g_utf8_validate (text, len, NULL)' failed This error only occurs with Unicode characters. When the text is ASCII it all works fine. I have tried three different base64 decoders, I tried using std::string and Glib::ustring with all the different decoders. I also tried using the function `Glib::locale_to_utf8()`, but that gives me the error `terminate called after throwing an instance of 'Glib::ConvertError'`. And I tried using `Glib::convert` with the same error. I know that Gtk::TextView can display Unicode because if I set the text to a string with Unicode it will display the text. I read that Gtk::TextView displays text in UTF-8, so I think my problem is that the decoded string is not coded in UTF-8, but I am not sure. So my question is how can I get Gtk::TextView to display the decoded base64? Thank you. _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gtk-list