Mxmclerror mxmlc Error Loading: "D:\Program Files\Java\jre6\bin\server\jvm.dll" mxmlc which is the flex compiler requires that you have Java Runtime Environment installed in you system which in particular must be 32 bit (at present). The error - Error Loading: "D:\Program Files\Java\jre6\bin\server\jvm.dll" is shown means you are having a 64 bit JRE. You need to point to a 32 bit version. Open the Environment Variable window and configure as shown in the screenshot. Create a new variable called JAVA_HOME with value pointing to the 32 bit version of JRE. In my case its D:\Program Files (x86)\Java\jre1.6.0_07\ Now mxmlc should work.

This application failed to start because msvcp71.dll was not found. Re-installing the application may fix this problem

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FLASH DEVELOP ERROR Debugger startup error: System.DllNotFoundException: jvm.dll