could not display ${out.body} at Log for external soap service provider

[Wang Yan]

i already got reply from to uri which is mock soap service (external soap
provider)
but why i could not see it in log with ${out.body}
i think soap is InOut exchangepattern, it should have out.body always
my code example looks like below

Any hints are more than welcome!

<from 
uri="cxf://http://{{soap.ip}}:{{soap.port}}/{{soap.service}}?dataFormat=MESSAGE&amp;wsdlURL=wsdl%2Fmyservice.wsdl";
/>
<convertBodyTo type="java.lang.String" />
<log message="##### Before Mock Service in.body ##### ${in.body}"
loggingLevel="INFO" />
<to uri="http4://localhost:8888/mockservice"/>
<log message="##### Before Mock Service out.body ##### ${out.body}"
loggingLevel="INFO" />