Bem, no STS 2.9.1 não estou conseguindo criar projeto Grails somente nessa nova versão. Segue o Erro:
Command terminated with an error code (see details for output) ------System.out:-----------
------System.err:----------- Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/groovy/tools/RootLoader Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.tools.RootLoader at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) Could not find the main class: org.codehaus.groovy.grails.cli.support.GrailsStarter. Program will exit.