This page is for the communication coming FROM Partner Portal TO the client (Usually SonWin)
Symptom:
Upon sending a workorder from the PartnerPortal to the SonWIn client, the following error appear on the webpage:

Cause and sollution:
The reason for this is, that the SonWin service is exposing itself as an active endpoint when it is running on a server.
When the Service is NOT running, there will be no endpoint to communicate to, hence the web page will give you an error.
Open up the receiving client machine, go to Services and start the service:

If you still get this error after starting the service, OR if the service was allready started another issue exist.