[LAU] lv2 vocoder

Hi list, I'm trying to use lv2 vocoder (launched by "lv2rack" and add an FX) but face a problem : everytime I try to change a value in the GUI, the appli crash and Debian "insults" in these terms : /usr/local/bin/zynjacku.py:2652: GtkWarning: gdk_x11_atom_to_xatom_for_display: assertion `atom != GDK_NONE' failed if file_dialog.run() == gtk.RESPONSE_OK: /usr/local/bin/lv2rack:198: DeprecationWarning: use gtk.Statusbar.remove_message self.statusbar.remove(statusbar_context_id, statusbar_id) Cannot set midi cc map for plugin without engine python: plugin.c :1292 : zynjacku_plugin_set_midi_cc_map_internal: L'assertion « 0 » a échoué. Abandon f@f:~$ Have search a while but google was not my friend this time... Any help really appreciate ! -F