.net - ContractFilter mismatch at the EndpointDispatcher exception in WCF -


i getting error when trying call self hosted wcf service

exception:

system.runtime.remoting.serverexception unhandled user code
message=the message action 'http://schemas.microsoft.com/clr/nsassem/quexsterp.businesscore.interfaces.ioperationservice/quexsterp.businesscore.interfaces#getall' cannot processed @ receiver, due contractfilter mismatch @ endpointdispatcher. may because of either contract mismatch (mismatched actions between sender , receiver) or binding/security mismatch between sender , receiver. check sender , receiver have same contract , same binding (including security requirements, e.g. message, transport, none).
source=mscorlib stacktrace: server stack trace: exception rethrown @ [0]: @ system.runtime.remoting.proxies.realproxy.handlereturnmessage(imessage reqmsg, imessage retmsg) @ system.runtime.remoting.proxies.realproxy.privateinvoke(messagedata& msgdata, int32 type)

service configuration

<?xml version="1.0"?> <configuration>   <system.servicemodel>     <services>       <service name="quexsterp.businesscore.businesslogic.sysadmin.operationservice"    behaviorconfiguration="wcfbasichttpbinding.service1behavior">         <endpoint address=""  binding="basichttpbinding" contract="quexsterp.businesscore.interfaces.ioperationservice">         </endpoint>         <host>           <baseaddresses>             <add baseaddress="http://bu-06-04:9001/operationservice/" />           </baseaddresses>         </host>         <endpoint address="mex" binding="mexhttpbinding" contract="imetadataexchange"/>       </service>     </services>     <bindings>       <nettcpbinding>         <binding name="tcpbindingconfig" maxbuffersize="5242880" maxreceivedmessagesize="5242880">           <readerquotas maxstringcontentlength="5242880" />           <security mode="none" />         </binding>       </nettcpbinding>     </bindings>     <behaviors>       <endpointbehaviors>         <behavior name="web">           <webhttp/>         </behavior>       </endpointbehaviors>       <servicebehaviors>         <behavior name="wcfbasichttpbinding.service1behavior">           <servicemetadata httpgetenabled="true"/>           <servicedebug includeexceptiondetailinfaults="false"/>         </behavior>       </servicebehaviors>     </behaviors>   </system.servicemodel>   <startup>     <supportedruntime version="v4.0" sku=".netframework,version=v4.0"/>   </startup> </configuration>

in client code

  ioperationservice myobj = (ioperationservice)activator.getobject(typeof(ioperationservice),"http://bu-06-04:9001/operationservice/");         return myobj.getall();

getall method causes exception


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