Aborting! ================================================================= ERROR: You must build Groovy with a 1.5+ JDK - but you can run the 'testOnly' target using Java 1.4. ================================================================= Aborting! Not found: ${groovyJar14path} ================================================================= ERROR: First build Groovy with a 1.5+ JDK: use the 'install' target set the flag: -DforceRetro=true set the -Djdk14home variable your 1.4 JDK basedir then you can run the 'testOnly' target on a 1.4 jvm. =================================================================