What's the meaning of the following exception?

------Start of DE processing------ = [19/04/07 15:28:37:718 BST] , key =
org.apache.tuscany.core.builder.WireConnectException
org.apache.tuscany.spi.extension.CompositeComponentExtension.prepare 392
Exception = org.apache.tuscany.core.builder.WireConnectException
Source =
org.apache.tuscany.spi.extension.CompositeComponentExtension.prepare
probeid = 392
Stack Dump = org.apache.tuscany.core.builder.WireConnectException: Inbound
chain must contain at least one interceptor
at org.apache.tuscany.core.builder.ConnectorImpl.connect(ConnectorImpl.java
:311)
at org.apache.tuscany.core.builder.ConnectorImpl.connect(ConnectorImpl.java
:211)
at org.apache.tuscany.core.builder.ConnectorImpl.connect(ConnectorImpl.java
:395)
at org.apache.tuscany.core.builder.ConnectorImpl.connect(ConnectorImpl.java
:351)
at org.apache.tuscany.core.builder.ConnectorImpl.handleService(
ConnectorImpl.java:556)
at org.apache.tuscany.core.builder.ConnectorImpl.connect(ConnectorImpl.java
:93)
at org.apache.tuscany.spi.extension.CompositeComponentExtension.prepare(
CompositeComponentExtension.java:388)
at org.apache.tuscany.core.deployer.DeployerImpl.deploy(DeployerImpl.java
:126)
at org.apache.tuscany.core.launcher.LauncherImpl.bootApplication(
LauncherImpl.java:233)
at com.ibm.ws.sca2.tuscany.util.TuscanyInterfaceImpl.startModule(
TuscanyInterfaceImpl.java:275)

The module is defined as follows:

<?xml version="1.0" encoding="UTF-8"?>
<composite
xmlns="http://www.osoa.org/xmlns/sca/1.0";
xmlns:wsdli="http://www.w3.org/2006/01/wsdl-instance";
wsdli:schemaLocation="../../sca-binding-jms.xsd"
name="JMSIteration1UseCase6ClientComposite">

<service name="JMSIteration1UseCase6ClientService">
 <interface.java interface="
com.ibm.ws.soa.binding.jms.service.JMSIteration1UseCase6Interface"/>
 <binding.jms>     .. stuff omitted...
 </binding.jms>

 <reference>JMSIteration1UseCase6ClientReference</reference>
</service>

<reference name="JMSIteration1UseCase6ClientReference">
 <interface.java interface="
com.ibm.ws.soa.binding.jms.service.JMSIteration1UseCase6Interface"/>
 <binding.jms>
... stuff omitted..
 </binding.jms>
</reference>

</composite>

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