No, it just sets different code paths in Flex 3
________________________________ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of VELO Sent: Thursday, May 01, 2008 4:04 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] -compiler.mxml.compatibility-version Hi, When I use compc or mxmlc with -compiler.mxml.compatibility-version. Can use swc libraries (e.g. framework.swc) from flex SDK 2.0.1? VELO