After some editing it seemed i have to specify the compiler.library-path as well as the compiler.source-path targeting the sdks libs and sources in both, the default and the custom configuration file. I thought the custom configuration file would be used in addition to the default one, adding new properties instead of overwriting old values. I include both files via flextasks using:
<mxmlc ...> <load-config filename="${FLEX_HOME}/frameworks/flex-config.xml" /> <load-config filename="${configuration.mxmlc.file}" /> </mxmlc> Or am i missing something?