I am writing this post becouse I am very “angry” and I need to say something before I explode. This error has “eat” three hours of my time (I am very angry when I lose my time with useless things).

All starts with a fresh OS. After I have install Adobe Flex Builder and import some of my projects I had try to run one project in a stand alone Flash Player BUT (big buttt) I have receive :

“Flex Builder Cannot Locate the Required Version of Flash Player” .

This was not my first time when I have receive this error so I had try to fix this, the simplest way I had know, access http://www.adobe.com/support/flashplayer/downloads.html download Flash Player 10 ActiveX control content debugger and reinstall Flash Player, BUT (again big buttt) no result the Flex Builder still bother me with : ”Flex Builder Cannot Locate the Required Version of Flash Player” so I call my best friend “Google” asking him about the error.

After at least a hour of searching and reading all I have found was how to fix this error for Firefox:

“Firefox was looking for the npswf32.dll in the ProgramFiles/Mozilla Fireforx/plugins directory yet Macromedia installed it in the window/system32/macromed/flash directory.”

some trash links and for a Stand Alone Flash Player to uninstall Flash Player and install the Debug version of Flash Player from http://www.adobe.com/support/flashplayer/downloads.html BUT no solution for me, nothing to work.

I tried to reinstall the Adobe Flex Builder, no luck, tried to install Flex Builder as a Eclipse plugin, no luck, no luck, no luck …… So if you are “HERE” when you thing nothing can help maybe the solution I will present next will help you.

I have found this trying to open a “.swf” file and see that no default program was set to open files with .swf extension, the next thing I have done was download the Download the Adobe Flash Player 10 Update for Windows and Macintosh extract the files and copy the “Player\Debug\FlashPlayer.exe” for example in “C:\”. After that I have select a .swf file and open it with “C:\FlashPlayer.exe” making this the default program to open “.swf” files.

After this simple action, BINGO no BUT no error in Flex Builde “all good to go”. I hope this can help you spare some time.

Becouse I have answered many times to this question and it took me a lot of time to find what this error means I decided to write a post with the  solution (in my case) to help you save some time.

So why Flex Builder display this this error ? Turns out if you create switch statement with no body in Flex Builder this unhelpful error is displayed. To solve your problem all you have to do is to add at least de “default” to your switch :

switch
{
    default:
} 

And this is all :D.

Obs: This is just one cause why Flex Builder displays this error.