# Fla compiles differently in Vista?

**URL:** https://forum.kirupa.com/t/fla-compiles-differently-in-vista/239543
**Category:** flash
**Created:** [September 23, 2007, 5:22am UTC](https://forum.kirupa.com/t/fla-compiles-differently-in-vista/239543 "2007-09-23T05:22:13Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![artcoder](https://avatars.discourse-cdn.com/v4/letter/a/3ec8ea/32.png) [@artcoder](https://forum.kirupa.com/u/artcoder)
#### Post date: [September 23, 2007, 5:22am UTC](https://forum.kirupa.com/t/fla-compiles-differently-in-vista/239543/1 "2007-09-23T05:22:13Z")

</div>

I am encountering a strange problem.

I have an FLA and SWF that had be developed on a Window XP machine. It works fine.

Now I take the same exact FLA to a different machine running Window Vista. I compile it to an SWF and upload to webserver. It appears to run. But I am noticing bugs in the application that did not exist before. Variables are becoming undefined.

Can it be that Vista produces different (in this case buggy) SWFs than Window XP? I’m running Flash 8 in both cases.

What types of things should I look for in my code for track this bug down?