Future resolved more than once

Hi - I have the below function declared on the server. I want it to finish completely before returning, hence the need for futures. But I keep getting “Future resolved more than once” … don’t know why.
Bing.web is an asynchronous function from a package.

              bing_api: function( query, skip ) {
                    var myFuture = new Future();

                    Bing.web(query, {
                            top: 50,
                            skip: skip
                        }, function(error, res, body){

                            if( error ) {

                        myFuture.return( {error: error, body: body });


                    return myFuture.wait();

Don’t you need to return myFuture.throw(error)? Not sure …