thank you Matthew for your reply, i tried it and it worked. but I have another question, so far i knew how to pass arguments for most of the the data types except for arrays. can you help me with this please? I need to pass for example array of UInt32. Also one thing is there any how to start tutorial for dbus-java Thank you for your help  <div class="gmail_quote">On Mon, Feb 25, 2008 at 1:23 AM, Matthew Johnson <<a href="mailto:dbus@matthew.ath.cx">dbus@matthew.ath.cx</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="Ih2E3d">On Sun Feb 24 18:56, mohammad rizk wrote: > I am new to dbus, I downloaded the latest release of dbus-java and tried to > use the DBusCall function to call a method. if the method does not take > arguments, I do not face any problem; however i face problems when the > method takes arguments. I do not know if i am using it in the wrong way or > there is a bug in the code. > > I am using it in the following way: > DBusCall org.freedesktop.DBus.Examples.Echo > /org/freedesktop/DBus/Examples/Echo org.freedesktop.DBus.EchoDemo Hello > > where Hello is the method name, when I append [world] to the above command > where "world" is a string argument , it starts giving errors like </div>You need to give it the type signature of the arguments before the arguments. For example, with a string argument it would be:   $ DBusCall org.freedesktop.DBus / org.freedesktop.DBus GetNameOwner s ":1.0"   [:1.0] Matt -- <a href="http://www.matthew.ath.cx" target="_blank">www.matthew.ath.cx</a> D-Bus Java -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHwfxY2XtckeYvo1gRApxVAKC5CIv51Je/mVKA8GLb0kgJ8nwwpACgqsx5 PXYzx8z7QCPajyIBa3YMqi0= =JGMZ -----END PGP SIGNATURE----- </blockquote></div>