This build requires a 64-bit JVM, and will not run with a 32-bit JVM. You can, for example, use the Sun 64-bit 1.5 JVM for AMD64. Note that the Sun 1.4.2 JVM for AMD64 is 32-bit and therefore cannot be used to run this build. There is a bug in the Oracle Java 7 64-bit JRE (b147) which may cause Eclipse to crash (http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7070134). The crash can be avoided by using the -XX:-UseLoopPredicate VM argument (-vmargs -XX:-UseLoopPredicate). Alternatively, you can use a different JRE.