Hi every­one,

I developed this web applic­a­tion for a cli­ent of mine. It was run­ning fine on a server but now they want an off­line for present­a­tion pur­poses.
So they asked me to do some changes (load local pic­tures etc…) and deploy an off­line version.

So while doing that I dis­covered the fol­low­ing error:

Flash Secur­ity Error — fpdownload.adobe.com

This error occurs when I tried to open the HTML file that embeds the SWF in my browser.

Doing what it says and chan­ging the global secur­ity set­tings didn’t help me. Once you click OK the browser opens and flash player dis­plays the fol­low­ing error:

SecurityError: Error #2028: Local-with-filesystem SWF file file:///C:/Users/Dan/Desktop/bin-release/MyFlashApplication.swf cannot access Internet URL http://fpdownload.adobe.com/pub/swz/flex/4.0.0.14159/osmf_flex.4.0.0.13495.swz.
at flash.net::URLStream/load()
at flash.net::URLLoader/load()
at mx.core::CrossDomainRSLItem/load()
at mx.core::RSLListLoader/loadNext()
at mx.core::RSLListLoader/load()
at mx.preloaders::Preloader/initialize()
at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::initialize()
at mx.managers::SystemManager/initHandler()

So from what I’ve learned the SWF file tries to load parts of the Flex Frame­work dynam­ic­ally from the Adobe server. Which in gen­eral is a good thing. But in this case it is not as we are try­ing to deploy a com­plete local ver­sion in case we can’t depend on a work­ing inter­net connection.

Solu­tion 1 — Set­ting com­piler arguments

The first solu­tion I tried is to set the fol­low­ing com­piler arguments

-use-network=false

in the Flash Builder Com­piler Settings.

Flash Builder Com­piler Argu­ments –use-network=false

For an older pro­ject of mine this was everything I needed to do. But with this pro­ject the same error still came up after open­ing the HTML file loc­ally in my browser.

Solu­tion 2 — Mer­ging the Frame­work into the code

To finally fix this issue I had to merge the Frame­work into my code so the Flash Player doesn’t try to load it at runtime. Remem­ber how I men­tioned earlier that’s what the Flash Player is try­ing to do. But since we can’t depend on a work­ing inter­net con­nec­tion we have to include all the neces­sary frame­work code into our pro­ject at com­pile time.

To accom­plish this you only need to do the fol­low­ing steps:
Go to your Pro­ject Prop­er­ties -> Flex Build Path -> Frame­work link­age: -> Merged into code

Flash Builder Build Path — Set­ting Frame­work Link­age to: Merged into Code

That should do the trick! Com­pile your applic­a­tion again and start it from any­where on your com­puter, send it to friends or cli­ents and will it run seam­lessly  on any computer.

I hope this helped any­one out there. I had to look for 30 min around vari­ous pages that came up on Google.
If it took you less time to find this site or if this helped you out please leave me  a comment.

Thanks for reading…