Yesterday I struggeled thru interesting problem. An application (deployed in weblogic) tried to communicate to webservice running in the same weblogic domain. An it was giving me following error:

POST /myapp/test HTTP/1.1
Content-type: application/soap+xml; charset=utf-8
Accept: application/soap+xml, multipart/related, text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Connection: Keep-Alive
Content-Length: 9212

]] Root cause of ServletException.
com.sun.xml.internal.messaging.saaj.SOAPExceptionImpl: {}Client.Access is not a standard Code value

As you can see, not very informative. Fortunately I tried google and revealed this article. That made me to send service to HTTPS port instead of HTTP and it seems that this error is returned not just in case you send HTTP to HTTPS (as the article describes) but also in case when you send HTTPS to HTTP port.