Riak ReferenceError - with custom javascript

I play around litle with riak riak-java-client.

Now I am having difficulty with custom javascript, I want to use collapse query in the summary.

If I use pure javascript functions as anon functions, they work well.

So here is what I did:

without commenting in app.conf

{js_source_dir, "/tmp/js_source"},

then I saved mylib.js in / tmp / js _source

/* content of mylib.js */
var NS = (function() {
    return {
        mapHighValues: function(value, keydata, arg) {
            var data = JSON.parse(value.values[0].data);
            ejsLog('/tmp/map_reduce.log', JSON.stringify(data.High));
             return [data.High];}
        },
        reduceSumHighValues: function(values) {
            ejsLog('/tmp/map_reduce.log', "ReduceVals\n" + JSON.stringify(values));
            return [values.reduce(function(prev, curr, index, array) {return prev + curr} ,0)];
        }
    }
})();

after that i restarted riak.

Here is the relevant Java code:

MapReduceBuilder builder = new MapReduceBuilder(new RiakClient("localhost"))
    .setBucket("goog")
    .map(JavascriptFunction.named("NS.mapHighValues"), false)
    .reduce(JavascriptFunction.named("NS.reduceSumHighValues"), true);
MapReduceResponseSource response = builder.submit();

Anyone see my mistake?

Greetings

Apehanger