First Step in Migrating AS 2.0 to AS 3.0

When you first open an AS 2.0 application you wish to migrate to AS 3.0, in Flash CS3, you will probably go to the Publish Setting dialog box and change the ActionScript version to ActionScript 3.0.

After that, just to be masochistic, you will probably test your movie and expect to get an onslaught of errors. Unfortunately, you will get NO ERRORS and your application will simply fail to work!

So, when migrating an AS 2.0 application to AS 3.0, stay in the publish settings dialog box a bit longer and click on the “settings” button next to the “ActionScript version” dropdown. Once in settings make sure the “strict mode” check box is checked.

Now you will get your helpful list of errors and be able to begin the not too painful process of migration from AS 2 to AS 3.