node-mapnik renders shapefile as a blank screen under x86-windows-7

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Node.js

Hello,

I'm trying to run through this node-mapnik tutorial:

http://build-failed.blogspot.com/2014/04/generating-server-side-tile-maps-with.html

I was able to get mapnik-v2.2.0 to install manually, and get its c++ and python demos to install, but I don't think node-mapnik uses that. Is there any way I can figure out what is wrong here? One clue my be that node-mapnik complains about not being able to load the gdap and ogr datasources when the server first starts (at the loadDataSources line), although this tutorial uses a shapefile so I don't see why that would matter.

I tried to use var bbox = mercatorO.bbox(x, y, z, false, '900913'); but i am getting below error

var bbox = mercatorO.bbox(x, y, z, false, '900913');
^
TypeError: Object function SphericalMercator(options) {
options = options || {};
this.size = options.size || 256;
if (!cache[this.size]) {
var size = this.size;
var c = cache[this.size] = {};
c.Bc = [];
c.Cc = [];
c.zc = [];
c.Ac = [];
for (var d = 0; d < 30; d++) {
c.Bc.push(size / 360);
c.Cc.push(size / (2 * Math.PI));
c.zc.push(size / 2);
c.Ac.push(size);
size *= 2;
}
}
this.Bc = cache[this.size].Bc;
this.Cc = cache[this.size].Cc;
this.zc = cache[this.size].zc;
this.Ac = cache[this.size].Ac;
} has no method 'bbox'
at C:\Program Files\nodejs\tile.js:72:22