Hi, Good to hear you're working on this!
Last week I greatly simplified the command line you need to successfully build a FlexJS project. We're working on getting the installer to create a 'one click FlexJS SDK' that will contain all dependencies except Java, but until that time it looks like you need to take only these 2 steps: 1) move your closure library from 'D:\NewSdks\closure-library-20130212' to 'D:\NewSdks\ApacheFlexJS\js\lib\google\closure-library' 2) use this command line: java -jar "D:\NewSdks\ApacheFlexJS\js\lib\mxmlc.jar" -load-config="D:\NewSdks\ApacheFlexJS\frameworks\flex-config.xml" "D:\TesTArea\TestProjects\DataBindingTest/src/DataBindingTest.mxml" All other command line arguments are (should be...) either unneeded or will result in duplicate code warnings/errors. Thanks, EdB PS. the one warning after successful compilation ("Data binding will not be able...") is expected and can be safely ignored. -- Ix Multimedia Software Jan Luykenstraat 27 3521 VB Utrecht T. 06-51952295 I. www.ixsoftware.nl