Flex app not working without debug version of Flash Player - apache-flex

Question

Recently, when I tried to show the results of my work (some Flex app) to my boss, i was quite suprised that application which run perfectly well on my pc, on my boss' pc wasn't displayed properly (the only thing visible was a default grey background). After 3h of trying absolutely everything, finally the app showed up when I changed his Flash Player version from standard one to debug (both was v. 10.0.22.87). Does anyone know what can be the reason of this (any compiler flag or sth). Forcing my boss to installing debug FP was quite ok, but forcing final user of the app to do so is unacceptable.
Thanks
PS: By showing I mean deploying to Tomcat on my pc and giving my boss a link to the app. We both use Win XP. Also when I installed debug FP for Netscape browsers and standard FP for IE (on my pc) the result is the same - working in Firefox, Opera, Chrome and grey background in IE. I've compiled both as a Debug and as a Release. I'm using Flash Develop 3.0.2 RTM
After stripping my app to sth like this - it still works only in debug FP
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:ca="components.*"
xmlns:ea="components.editAreas.*"
layout="vertical"
backgroundColor="black">
<mx:Canvas id="header"
verticalScrollPolicy="off"
horizontalScrollPolicy="off"
styleName="header"
width="100%"></mx:Canvas>
<mx:Canvas id="mainContent"
width="100%" height="100%"
verticalScrollPolicy="off">
</mx:Canvas>
</mx:Application>

Answer 1

The same kind of issue i faced few days back.
I was using following code
//Call To The Function
traceDetails(new Error())
private function traceDetails(err:Error):void
{
err.getStackTrace()
}
On My part i was using the method "getStackTrace()" Here the thing to remember is that getStackTrace() method is only available with Flash Debugger and Not With Flash player. So Wherever i do not have Flash Debugger installed my application stops running.
So Things to do
1. Check if Your using any API call that are only available in Flash Debugger and Not in Flash player(If You found Try commenting that line Application will start running).
2. Work around Install Flash Debugger Version wherever you are running your application or Simply before your Flash Debugger API calls Check if(Capabilities.isDebugger) only then use those API or Skip those lines.
I am sure this will solve your problem
Happy Coding :)

Answer 2

Just some suggestions...
Ensure you're deploying the release
build.
After doing that you may want to
delete the browser cache - I
oftentimes have our users do that
after a release since it will
occasionally load the old version
after a release is put out there.
Are you using Modules? Are you maybe
referencing a debug module?
Check your paths defined in the
compiler arguments of the project, as
well as the paths of any Modules you
may be using. Can you provide us with your compiler args?
Are you and your boss using the same version of I.E.?
Did you change the index.html file to reference another swf?

Answer 3

This smells like a security issue to me; the debugger enforces fewer security policies than the standard player, and your mention of Tomcat and those namespace references suggest there's something security-related going on here.
What are components.* and components.editAreas.* used for? Are you attempting to load and access any binary data in your application? Could you maybe post a little more code? Because what you've posted here is pretty innocuous. Might be easier to help with a bit more detail, but again, you're most likely running up against a security restriction somewhere.

Answer 4

I agree with Christian. It has to do with the security policies of the standard flash player. After removing/patching the FlexSprite class, which called the getStackTrace() function, the app is now working fine. Thank you for your help.
surfined