Hi all, I am newbie in DBus programming using java. I am trying to call a method "myfun" on an object class "Demo" in a simple java program (TestDBus.java) from another java program (TestDBus1.java) using DBus Connection. I am able to connecct both these applications to DBus but my code is not able to call method "myfun" and I got some exception. My code and run time exception are as below : <-------------------------------------------- Demo.java -----------------------------------------------------------------> package pack; import org.freedesktop.DBus; import org.freedesktop.dbus.DBusConnection; import org.freedesktop.dbus.exceptions.DBusException; import org.freedesktop.dbus.DBusInterface; interface TestDBusInt extends DBusInterface{ public void myfun(); } public class Demo implements TestDBusInt{ public Demo(){} public boolean isRemote(){return false;} public void myfun(){ System.out.println("Within myfun of Demo class within TestDBus.class"); } } <----------------------------------------- TestDBus.java ----------------------------------------------------------> import org.freedesktop.DBus; import org.freedesktop.dbus.exceptions.DBusException; import org.freedesktop.dbus.*; import pack.Demo; public class TestDBus{ public static void main(String[] args) throws org.freedesktop.dbus.exceptions.DBusException { DBusConnection bus = null; // Getting the Bus Connection. System.out.println("Connecting Bus........"); bus = DBusConnection.getConnection(DBusConnection.SESSION); System.out.println("Bus Connection Established."); //Getting Unique name of this connection. String conName=bus.getUniqueName(); System.out.println("Unique Name of this Bus Connection => "+conName); //Requesting Bus Name. bus.requestBusName("My.FirstBus"); //Getting the names owned by this connection. System.out.println("Names owned by this Bus Connection are =>"); String []bnames1=bus.getNames(); for(int i=0;i<bnames1.length;i++) System.out.println(bnames1[i]); //exporting the Demo class object on the path “/Test” DBusInterface db1=new Demo(); bus.exportObject("/Test", db1); while(true){} } } <----------------------------------------- TestDBus1.java ----------------------------------------------------------> import org.freedesktop.DBus; import org.freedesktop.dbus.*; import java.lang.reflect.*; import org.freedesktop.DBus.Introspectable; import org.freedesktop.*; import pack.Demo; public class TestDBus1 { public static void main(String[] args) throws org.freedesktop.dbus.exceptions.DBusException { DBusConnection bus1 = null; DBusConnection bus2=null; System.out.println("Establishing Bus Connection......."); bus1 = DBusConnection.getConnection(DBusConnection.SESSION); System.out.println("Bus Connection Established."); //Getting Unique name of this connection. String conName1=bus1.getUniqueName(); System.out.println("Unique Name of this Bus Connection => "+conName1); // Getting and Displaying Introspection data on Remote Object. Introspectable intro = (Introspectable) bus1.getRemoteObject( "My.FirstBus", "/Test", Introspectable.class); String data = intro.Introspect(); //System.out.println(db.myfun()); System.out.println("<--------------------------- Introspection Data Start ----------------------------------->"); System.out.println(data); System.out.println("<--------------------------- Introspection Data End ----------------------------------->"); //Getting the remote object and calling a method of that object. DBusInterface db=bus1.getPeerRemoteObject("My.FirstBus","/Test"); DBusAsyncReply<Boolean> stuffreply =bus1.callMethodAsync(db,"myfun"); while(true){} } } <--------------------------------------------------End Of Code --------------------------------------------------------------------------------------> <--------------------------------------------Console Output on running TestDBus.java ---------------------------------------> Connecting Bus........ Bus Connection Established. Unique Name of this Bus Connection => :1.37 Names owned by this Bus Connection are => :1.37 My.FirstBus ^Cshivnath@cmk-kbcs-shivnath:~/jdk1.6.0_07/bin/dbusex2$ java TestDBus Connecting Bus........ Bus Connection Established. Unique Name of this Bus Connection => :1.39 Names owned by this Bus Connection are => :1.39 My.FirstBus <------------------------------------- Console Output on running TestDBus1.java ---------------------------------------> Establishing Bus Connection....... Bus Connection Established. Unique Name of this Bus Connection => :1.40 <--------------------------- Introspection Data Start -----------------------------------> <!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "<a href="http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd</a>"> <node name="/Test"> <interface name="pack.TestDBusInt"> <method name="myfun" > </method> </interface> <interface name="org.freedesktop.DBus.Introspectable"> <method name="Introspect"> <arg type="s" direction="out"/> </method> </interface> <interface name="org.freedesktop.DBus.Peer"> <method name="Ping"> </method> </interface> </node> <--------------------------- Introspection Data End -----------------------------------> Exception in thread "main" org.freedesktop.dbus.exceptions.DBusExecutionException: $Proxy2.myfun() at org.freedesktop.dbus.AbstractConnection.callMethodAsync(AbstractConnection.java:683) at TestDBus1.main(TestDBus1.java:48) <------------------------------------------------------End of Console Output--------------------------------------------------------------> I am not sure, if I am missing something obvious here and would appreciate any advice on this. Plz, help me if I am going wrong in some way. Plz suggest me what to do to fix such exception and call the method as I want. Waiting for your reply. Thanks in Advance !! -- Regards, Shiv Nath Kumar