flex error message: If the program is already running, close it before attempting to run.

problem

adobe flex4 AS3.0 air Launching an air application from Flex 4 IDE, it crashes because of a bug, but the widow of the application is not created so… Trying to launch the application again you get the error If the program is already running, close it before attempting to run. You cannot close the application… how to kill this invisible application? --- > dn

solution

kill the process adl.exe