[errai-users] Trouble sending messages

I'm having trouble getting a message to go through using ErraiBus. I'm using this on the client side: CommandMessage msg = (CommandMessage) CommandMessage.create().toSubject("Items").set("SerialNumber", serialInput.getValue()); bus.conversationWith(msg, new MessageCallback() { @Override public void callback(Message message) { //throw new UnsupportedOperationException("Not supported yet."); Item item = message.get(Item.class, "Item"); MessageBox.alert("Errai", item.getSerialNumber().toString(), null); } }); With this on the server side: @Service("Items") public class Items implements MessageCallback { private MessageBus bus; @Inject public Items(MessageBus bus) { this.bus = bus; System.out.println("Got a bus..."); } @Override public void callback(Message message) { //throw new UnsupportedOperationException("Not supported yet."); System.out.println("Incoming message..."); Long serialNum = message.get(Long.class, "SerialNumber"); System.out.println(serialNum); Item item = new Item(); item.setSerialNumber(serialNum); ConversationMessage.create(message).set("Item",item).sendNowWith(bus); } } However, all it seems to send is: {"CommandType":"RemoteSubscribe","ToSubject":"ServerBus","Subject":"temp:Con versation:2","PriorityProcessing":"1"} I don't see where it actually sends my body or the subject that I fill out in my message. Nothing also gets to the Service class. Am I doing something wrong? I have Tomcat running NIO and everything else seems set up correctly. It will keep a GET connection open and do the POST of the JSON above, but nowhere does it seem to send what I want it to. I also seem to be getting these occasionally, usually on some of the first requests to in.erraiBus: java.lang.NullPointerException at org.jboss.errai.bus.server.servlet.TomcatCometServlet.event(TomcatCometServl et.java:105) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilterEvent(Unknow n Source) at org.apache.catalina.core.ApplicationFilterChain.doFilterEvent(Unknown Source) at org.apache.catalina.core.StandardWrapperValve.event(Unknown Source) at org.apache.catalina.core.StandardContextValve.event(Unknown Source) at org.apache.catalina.core.StandardHostValve.event(Unknown Source) at org.apache.catalina.valves.ValveBase.event(Unknown Source) at org.apache.catalina.core.StandardEngineValve.event(Unknown Source) at org.apache.catalina.connector.CoyoteAdapter.event(Unknown Source) at org.apache.coyote.http11.Http11NioProcessor.event(Unknown Source) at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.event(Unk nown Source) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.ja va:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:9 08) at java.lang.Thread.run(Thread.java:619) Can anyone point me at what I'm missing?