Solution to the ORABEL-08021 "partnerlink not found" problem!

I was seeing an ORABPEL-08021 error when calling a Oracle BPEL web service via C# in .Net. Specifically, the error returned was:

<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
  <env:Header/>
  <env:Body>
    <env:Fault xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
      <faultcode xmlns="">env:Server</faultcode>
      <faultstring xmlns="">ORABPEL-08021 Cannot find partner wsdl. parnterLink "MyService" is not found in process "MyService" (revision "1.0") Please check the deployment descriptor of the process to find the correct partnerLink name.
      </faultstring>
      <faultactor xmlns=""></faultactor>
    </env:Fault>
  </env:Body>
</env:Envelope>

The problem was that I was using the wrong URI to access the service. I was using:

http://myserver:8888/orabpel/default/MyService/1.0/MyService

and I should have been using:

http://myserver:8888/orabpel/default/MyService/1.0

So, my own silly fault really! Normally I can take the WSDL address (eg. http://myserver:8888/orabpel/default/MyService/1.0/MyService?wsdl) and just drop the "?wsdl" off the end to get the service endpoint. Not with these Oracle BPEL services though. If I had bothered to read the WSDL, I would have seen that the endpoint address is clearly specified. One more thing to note: with an Oracle BPEL service, you can also drop the version number off the end and it will still work, calling the latest version by default. eg:

http://myserver:8888/orabpel/default/MyService