I've having an extremely agonizing time dealing with mysterious alert messages when trying to debug my Flex Builder 3 project. Debugging begins, the status bar reads "Launching project: (91%)", the application loads in the browser and displays, but back in Flex it hangs with an error message:
Launch Failed Invalid argument This error message could be more informative. As is, no details, no line number given. Fixes I've tried, in combination and alone, to no avail: ) Clean Project. ) Strip mxml down to single bare Application tag. ) Delete build folder. Install details: Mac OS X 10.6.1 Safari 4.0.3 (6531.9) Flex Builder 3.0.2 Flash Player 10.0.32.18 content debugger Any insight would be terrific. Thanks, Steve