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Exception stack is:
1. null (java.lang.NullPointerException)
  org.mule.config.builders.TransformerReference:84 (null)
2. MuleManager Failed to initialise (org.mule.config.ConfigurationException)
  org.mule.config.builders.MuleXmlConfigurationBuilder:283 (http://mule.mulesource.org/docs/apidocs/org/mule/config/ConfigurationException.html)
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Root Exception stack trace:
java.lang.NullPointerException
        at org.mule.config.builders.TransformerReference.resolveTransformer(TransformerReference.java:84)
        at org.mule.config.builders.MuleXmlConfigurationBuilder.setTransformers(MuleXmlConfigurationBuilder.java:322)
        at org.mule.config.builders.MuleXmlConfigurationBuilder.configure(MuleXmlConfigurationBuilder.java:273)
        at org.mule.config.builders.MuleXmlConfigurationBuilder.configure(MuleXmlConfigurationBuilder.java:218)
        at org.mule.MuleServer.initialize(MuleServer.java:294)
        at org.mule.MuleServer.run(MuleServer.java:207)
        at org.mule.MuleServer.start(MuleServer.java:195)
        at org.mule.MuleServer.main(MuleServer.java:166)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.tanukisoftware.wrapper.WrapperSimpleApp.run(WrapperSimpleApp.java:240)
        at java.lang.Thread.run(Thread.java:619)

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