title: Grails / Groovy / GGTS: Conflicting module versions on run-app
body: <p>After upgrading a Grails application from 2.2.0 to 2.2.1 I keep getting the following error when attempting to debug a Grails application from GGTS via Debug as... -> Grails Command (run-app):</p>
  
  <pre><code>Error starting Grails: nulljava.lang.ExceptionInInitializerError
  at org.codehaus.groovy.runtime.InvokerHelper.&lt;clinit&gt;(InvokerHelper.java:62)
  at groovy.lang.GroovyObjectSupport.&lt;init&gt;(GroovyObjectSupport.java:32)
  at groovy.lang.Closure.&lt;init&gt;(Closure.java:221)
  at groovy.lang.Closure.&lt;init&gt;(Closure.java:238)
  at groovy.lang.Closure$1.&lt;init&gt;(Closure.java:205)
  at groovy.lang.Closure.&lt;clinit&gt;(Closure.java:205)
  at org.codehaus.groovy.grails.cli.GrailsScriptRunner.&lt;clinit&gt;(GrailsScriptRunner.java:84)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:601)
  at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
  at org.codehaus.groovy.grails.cli.support.GrailsStarter.rootLoader(GrailsStarter.java:234)
  at org.codehaus.groovy.grails.cli.support.GrailsStarter.main(GrailsStarter.java:262)
  Caused by: groovy.lang.GroovyRuntimeException: Conflicting module versions. Module [groovy-all is loaded in version 2.0.5 and you are trying to load version 2.0.7
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.registerExtensionModuleFromProperties(MetaClassRegistryImpl.java:186)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.registerExtensionModuleFromMetaInf(MetaClassRegistryImpl.java:174)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.registerClasspathModules(MetaClassRegistryImpl.java:156)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.&lt;init&gt;(MetaClassRegistryImpl.java:111)
  at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.&lt;init&gt;(MetaClassRegistryImpl.java:73)
  at groovy.lang.GroovySystem.&lt;clinit&gt;(GroovySystem.java:33)
  ... 14 more
  </code></pre>
  
  <p>I'm running GGTS 3.1.0.RELEASE with the Groovy Compiler 2.0 Feature 2.7.1.xx-20120921-2000-e42RELEASE and Groovy/Grails Tool Suite 3.1.0.201210061306-RELEASE-e42. The project has configured Groovy Compiler level 2.0. Eclipse Preferences say "You are currently using Groovy Compiler version 2.0.4.xx-20120921-2000-e42RELEASE".</p>
  
  <p>Any hints?</p>