Gordon, I saw that you added the property 'compiler.jar.dependencies' to the compiler/build.xml. The property contains the correct JARs, but the 'lib/' folder is not needed (since compiler.jar is in the same folder as the referenced JAR files.
The property value should be: <property name="compiler.jar.dependencies" value="antlr.jar commons-cli.jar commons-io.jar guava.jar lzma-sdk.jar .." /> I've updated the JIRA issue accordingly: https://issues.apache.org/jira/browse/FLEX-33196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13452996#comment-13454831 - Raju
