Producing Flash trace output from a browser

The source of this fine nugget is g.wygonik’s flash experiments who found the info in Flex documentation. I’ve visited or pointed people to that page so often I decided to post it here in case anything ever happened to the original. This really is convenient.

  1. Right-click on the “My Computer” icon on the Windows XP desktop and select Properties to open the “System Properties” dialog
  2. Click the Advanced tab
  3. Click the Environment Variables button
  4. Add the following environment variables to the User Variables (not the System ones)
    – HOMEDRIVE with a value of “C:” (no quotes)
    – HOMEPATH with a value of “%USERPROFILE%” (again no quotes)
  5. Navigate to the C:\Documents and Settings\[i]username[/i] folder and create a new text file named “mm.cfg”
  6. Open the text file and add the following:
  7. Download and install the Flash program debug player from Adobe.
  8. Install the version of your choice (ActiveX for IE / Netscape-compatible for FF)
  9. Open a web page with a SWF in it. If there is now a “Debugger” option in the context-menu, you have the Debug player installed. if not, try again, or try the uninstaller as mentioned above.
  10. Open Flash and make a new FLA with the following AS in the Actions panel:
    trace(“I am alive”); // or some other goofy test thing
  11. Publish your movie and open the HTML page
  12. Open Windows Explorer and look in the root of C:\ – there should be a flashlog.txt file (if not, check all the settings above and perhaps log-out and log back in, or reboot and try it again)
  13. Open the flashlog.txt file and you should see your trace output.


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