The requested operation failed, when saving a web service, why?

Hi, I am using 8.5.3 to create a simple web service using java by clicking “New Web Service provider”, after finished the javs codes, and click Compile All button, I got the sucussfully compiled message, but when I was closing the WebService provider, I got this error message: “The requested operation failed”, does anybody know why? thanks

Subject: The requested operation failed, when saving a web service, why?

You’ve clearly identified this as an 8.5 issue, but this is the forum for Notes/Domino 6 and 7.