sending self defined errors over dbus

[Steve Kreyer]

Hi,

I'm using the glib-binding for DBus and have some problems sending self 
defined errors. There's an enum which is called AuxinError. The error is 
set the following way:
-------------------
gboolean
some_remote_proc (..., const gchar *IN_path, GError **error)
{
  ...
  if (error_occured)
    g_set_error (error,
           g_quark_from_string ("AuxinError"),
           AUXIN_WRONG_PARAMETER,
           "%s is not a directory!",
           IN_path);
}
--------------------

If a wrong request (with the wrong parameter) via dbus-send was send, I 
get "Error org.freedesktop.DBus.GLib.UnmappedError.AuxinError.Code6 
/path/file is not a directory!" as an answer from DBus.
What does the symbol "UnmappedError" stand for? Is it the right way to 
send errors over DBus?
Also I noticed that theres a function provided by the glib-binding which 
is called dbus_g_error_domain_register. I've tried to generate GEnums 
out of my raw enum definition and then register the new error domain like:
---------------
dbus_g_error_domain_register (AUXIN_ERROR, NULL, AUXIN_TYPE_ERROR);
---------------

But without success: If a wrong request at the remote procedure occures 
the program crashes with the following error:

process 12861: arguments to dbus_message_new_error() were incorrect, 
assertion "_dbus_check_is_valid_error_name (error_name)" failed in file 
dbus-message.c line 1207.
This is normally a bug in some application using the D-Bus library.

Is there an alternative to declare the new error domain to dbus?

Any help on this issue would be appreciated ...

TIA,
Steve
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