mule - Message payload is of type: String -

i try test transforming data in flow example in page : "http://www.mulesoft.org/documentation/display/current/transforming+data+in+a+flow"

but error on browsers : component caused exception is: defaultjavacomponent{hellowflow1.commponent.30555765}. message payload of type: string

the exact message in console of mule studio :

 error 2013-05-01 12:39:19,067 [[configureendpoint].connector.http.mule.default.receiver.04] org.mule.exception.defaultmessagingexceptionstrategy: ******************************************************************************** message : failed find entry point component, following resolvers tried failed: [ callableentrypointresolver: object "nametransformer{this=4146a7, name='null', ignorebadinput=false, returnclass=simpledatatype{type=java.lang.object, mimetype='*/*'}, sourcetypes=[]}" not implement required interface "interface org.mule.api.lifecycle.callable" methodheaderpropertyentrypointresolver: required property "method" not set on event annotatedentrypointresolver: component: nametransformer{this=4146a7, name='null', ignorebadinput=false, returnclass=simpledatatype{type=java.lang.object, mimetype='*/*'}, sourcetypes=[]} doesn't have annotated methods, skipping. reflectionentrypointresolver: found many possible methods on object "org.mule.examples.hello.nametransformer" accept parameters "{class java.lang.string}", methods matched "[public void org.mule.transformer.abstracttransformer.setmimetype(java.lang.string) throws javax.activation.mimetypeparseexception, public final java.lang.object org.mule.transformer.abstracttransformer.transform(java.lang.object) throws org.mule.api.transformer.transformerexception, public void org.mule.transformer.abstracttransformer.setname(java.lang.string), public void org.mule.transformer.abstracttransformer.setencoding(java.lang.string)]" ] code : mule_error-321 -------------------------------------------------------------------------------- exception stack is: 1. failed find entry point component, following resolvers tried failed: [ callableentrypointresolver: object "nametransformer{this=4146a7, name='null', ignorebadinput=false, returnclass=simpledatatype{type=java.lang.object, mimetype='*/*'}, sourcetypes=[]}" not implement required interface "interface org.mule.api.lifecycle.callable" methodheaderpropertyentrypointresolver: required property "method" not set on event annotatedentrypointresolver: component: nametransformer{this=4146a7, name='null', ignorebadinput=false, returnclass=simpledatatype{type=java.lang.object, mimetype='*/*'}, sourcetypes=[]} doesn't have annotated methods, skipping. reflectionentrypointresolver: found many possible methods on object "org.mule.examples.hello.nametransformer" accept parameters "{class java.lang.string}", methods matched "[public void org.mule.transformer.abstracttransformer.setmimetype(java.lang.string) throws javax.activation.mimetypeparseexception, public final java.lang.object org.mule.transformer.abstracttransformer.transform(java.lang.object) throws org.mule.api.transformer.transformerexception, public void org.mule.transformer.abstracttransformer.setname(java.lang.string), public void org.mule.transformer.abstracttransformer.setencoding(java.lang.string)]" ] (org.mule.model.resolvers.entrypointnotfoundexception) org.mule.model.resolvers.defaultentrypointresolverset:52 (http://www.mulesoft.org/docs/site/cur...) -------------------------------------------------------------------------------- root exception stack trace: org.mule.model.resolvers.entrypointnotfoundexception: failed find entry point component, following resolvers tried failed: [ callableentrypointresolver: object "nametransformer{this=4146a7, name='null', ignorebadinput=false, returnclass=simpledatatype{type=java.lang.object, mimetype='*/*'}, sourcetypes=[]}" not implement required interface "interface org.mule.api.lifecycle.callable" methodheaderpropertyentrypointresolver: required property "method" not set on event annotatedentrypointresolver: component: nametransformer{this=4146a7, name='null', ignorebadinput=false, returnclass=simpledatatype{type=java.lang.object, mimetype='*/*'}, sourcetypes=[]} doesn't have annotated methods, skipping. reflectionentrypointresolver: found many possible methods on object "org.mule.examples.hello.nametransformer" accept parameters "{class java.lang.string}", methods matched "[public void org.mule.transformer.abstracttransformer.setmimetype(java.lang.string) throws javax.activation.mimetypeparseexception, public final java.lang.object org.mule.transformer.abstracttransformer.transform(java.lang.object) throws org.mule.api.transformer.transformerexception, public void org.mule.transformer.abstracttransformer.setname(java.lang.string), public void org.mule.transformer.abstracttransformer.setencoding(java.lang.string)]" ] @ org.mule.model.resolvers.defaultentrypointresolverset.invoke(defaultentrypointresolverset.java:52) @ org.mule.component.defaultcomponentlifecycleadapter.invoke(defaultcomponentlifecycleadapter.java:343) @ org.mule.component.abstractjavacomponent.invokecomponentinstance(abstractjavacomponent.java:86) + 3 more (set debug level logging or '-dmule.verbose.exceptions=true' everything)  

if possible me solve it.

you're not showing xml configuration i'm forced take wild guess based on exception see: bet wrongly used java component instead of java transformer when configured org.mule.examples.hello.nametransformer.