Skip to main content

Flex + Google Analytics - Fix Error #1009: Cannot access a property or method of a null object

Google has released a library for Flash and Flex to embed google analytics calls into your Flash/Flex app.  You can find info and Google's sample code here: <a href=""></a>.

Since I use Flex, thats all I will cover here.

When I implemented Google's code, I got the "Error #1009: Cannot access a property or method of a null object" error that seems to show up from time to time. I knew it had to do with google analytics, since it was a fully working app before I added GA.<more/>This very vague error means exactly what it says: you tried to do something with an object that wasn't initialized yet.  I know this isn't helpful, but getting your brain around this will help you figure out what to do.

The error was being thrown in the code from Google's page in the onComplete() method here:
tracker = new GATracker( this, "UA-111-222", "AS3", false );


In my case, everything in the code said that it SHOULD be working fine.  So I said to myself, ok self, it should be initializing properly, but it isn't, so what can I do about it?  What I came up with is, instead of initializing the GATracker in the component's onComplete() method, go to where I want to use the tracker object, and right before I use it, check to make sure that it is initialized.  So I ended up with:

// setup Google Analytics
if (tracker == null)
tracker = new GATracker( this, "UA-111-222", "AS3", false );
tracker.trackPageview( "/your_ficticious_page/" );


And this worked perfectly :)  Obviously the extra variable checking has the potential to introduces a small performance hit, but when it DOESN'T work one way, and DOES work another way, performance hit or no, we all tend to go the way that works :)

Popular posts from this blog

Installing python 3.4.x on OSX El Capitan

I love "brew" package manager, but sometimes being too progressive breaks things.  I have several python apps that I maintain that get deployed to AWS using Elastic Beanstalk.  AWS eb can deploy with python 2.7 or 3.4.  Any recent 'brew install python3" will get 3.5.1. #annoying

Making Macbook Air with 128GB SSD usable with Bootcamp

I recently got a new Macbook Air 11" (the 2012 version) and loaded it with goodies like 8GB ram and 2GHz Core i7.  What I DIDN'T upgrade was the internal SSD.  My config came with 128GB SSD and I refused to pay $300+ to upgrade it to 256GB.  Yeah I know, some call me cheap, but SSds cost $75-$150 for 240GB, so adding another 128GB for $300 seemed way too steep for me.  I figured "ok, I'm going to make 128G work!"

Here is the story of how that went...

Getting Started with OpenVAS on CentOS - an open source vulnerability scanner

The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools offering a comprehensive and powerful vulnerability scanning and vulnerability management solution. (Taken from the OpenVAS website, which is at )

This blog entry will introduce OpenVAS version 3.1, walk through installation on CentOS and is intended as a "getting started" guide. I'll also do a guide for installing on Ubuntu later.