I have a large project for a complex UI. The project involves more than 100 mxml and as3 files. I pulled the project into Flash Builder 4, made no changes to the namespaces in mxml, made a small text change to force a build. I'm seeing strange build behavior with the workspace building message in the lower right-hand corner of Flash Builder 4 changing from 0 to about 20% and then appearing to start over again. Error messages appear and disappear. I finally aborted the build because it had not completed after 20 minutes.
Has anyone else tried building a large project? Is there something that I'm not doing correctly? Is this just an affect of an early beta?
Just throwing a guess out there, but try adding -compatibility-version=3.0.0 to the compile arguments in your project.
Setting compatibility to version 3 fixed the build problem. Thanks for the suggestion. Only issue I see is having the compatibility set, the project cannot benefit from Flex 4 capabilities. I'm not looking forward to changing all of my mxml files for the new features and structure.
I wonder if Adobe is going to provide any tools for migrating Flex 3 mxml to Flex 4 mxml?