Load precompiled sqlite db ionic

I'm trying to load an existent sqlite db into my ionic app.

I followed this guide http://ift.tt/1W7k7Yy

This is my code in app.js:

var app = angular.module('ionicApp', ['ionic', 'ngCordova']);
var db = null;

app.run(function($ionicPlatform, $cordovaSQLite) {
        $ionicPlatform.ready(function() {
            if(window.cordova && window.cordova.plugins.Keyboard) {
                cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
            }
            if(window.StatusBar) {
                StatusBar.styleDefault();
            }

            window.plugins.sqlDB.copy("comeInComoDB.db", function() {
                db = $cordovaSQLite.openDB("comeInComoDB.db");
            }, function(error) {
                console.error("There was an error copying the database: " + JSON.stringify(error));
                db = $cordovaSQLite.openDB("comeInComoDB.db");
            });

            var query = "SELECT MAX(visit_log_id) as visit_log_id_max, station_id, visit_ts FROM visit_log";

            $cordovaSQLite.execute(db, query, []).then(function(res) {
                if(res.rows.length > 0) {
                    for(var i = 0; i < res.rows.length; i++) {
                        console.log("SELECTED -> " + res.rows.item(i).station_id);
                    }
                } else {
                    console.log("No results found");
                }
            }, function (err) {
                console.error(JSON.stringify(err));
            });

        });
    });

When I launch my app on android ionic run android -l -c

I get this:

796897   error    Uncaught TypeError: Cannot read property 'transaction' of null, http://ift.tt/1W7k7YA, Line: 9

My sqlite DB is in www/comeInComoDB.db

Can you please help me?

Are there alternatives to load existent data from a db into my ionic app?

Thank you