# Error rmi.connection

**URL:** <https://forum.servoy.com/t/error-rmi-connection/17915>\
**Category:** Classic Servoy\
**Created:** [April 17, 2014, 10:38am UTC](https://forum.servoy.com/t/error-rmi-connection/17915 "2014-04-17T10:38:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![derk.hulshof](https://avatars.discourse-cdn.com/v4/letter/d/e47774/32.png) [@derk.hulshof](https://forum.servoy.com/u/derk.hulshof)\
**Post date:** [April 17, 2014, 10:38am UTC](https://forum.servoy.com/t/error-rmi-connection/17915/1 "2014-04-17T10:38:57Z")

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Can someone explain this error for me?  
And what is com.servoy.j2db.dataprocessing.Zb exactly doing?

I got this message since I updated the servoy server to 7.3.1

014-04-17 12:16 pool-2-thread-551 ERROR com.servoy.j2db.dataprocessing.Zb Error flushing message buffer to client D6488C70-D9E5-4E0C-9FC8-B7A8007F3798  
java.rmi.ConnectException: Connection refused to host: [IPadres]; nested exception is:  
java.net.ConnectException: no multiplexer found for server with id=597ec4dc-3a47-4a5f-bc7d-785c4647999d  
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)  
at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)  
at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)  
at sun.rmi.server.UnicastRef.invoke(Unknown Source)  
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source)  
at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)  
at com.sun.proxy.$Proxy26.isAlive(Unknown Source)  
at com.servoy.j2db.dataprocessing.ClientProxy.Zc(ClientProxy.java:164)  
at com.servoy.j2db.dataprocessing.Zo.run(Zo.java:19)  
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  
at java.lang.Thread.run(Unknown Source)  
Caused by: java.net.ConnectException: no multiplexer found for server with id=597ec4dc-3a47-4a5f-bc7d-785c4647999d  
at com.sebster.tunnel.impl.hd.createSocket(hd.java:12)  
at com.servoy.j2db.server.rmi.tunnel.WrappingCompressingRMIClientSocketFactory.createSocket(WrappingCompressingRMIClientSocketFactory.java:28)

Tnx in advance