I tried to update AS trunk with the latest MC libs. It builds OK (running build.bat from root), but trying to run it I get this: C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\bin>run Calling C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\bin\run.conf.bat =============================================================================== JBoss Bootstrap Environment JBOSS_HOME: C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT JAVA: c:\Java\jdk1.6.0_11\bin\java JAVA_OPTS: -Dprogram.name=run.bat -Xms128M -Xmx512M -XX:MaxPermSize=256M -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Dorg.jboss.resolver.warning=tru CLASSPATH: c:\Java\jdk1.6.0_11\lib\tools.jar;C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\bin\run.jar =============================================================================== WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\concurrent.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-logging-spi.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-logmanager.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-logging-logmanager.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-common-core.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-bootstrap-spi.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-bootstrap-spi-as.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-bootstrap-spi-mc.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-bootstrap-impl-base.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-bootstrap-impl-as.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-bootstrap-impl-mc.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\javassist.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-reflect.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-mdr.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-dependency.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-kernel.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-metatype.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-managed.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-vfs.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-classloading-spi.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-classloader.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-classloading.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-classloading-vfs.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-aop.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\jboss-aop-mc-int.jar WARNING: Could not find expected boot lib C:\projects\jboss5\trunk\build\output\jboss-6.0.0-SNAPSHOT\lib\trove.jar Failed to boot JBoss: java.lang.IllegalArgumentException: Specified implementation class could not be found: org.jboss.bootstrap.impl.as.server.JBossASServerImpl on ClassLoader java.net.URLClassLoader@1632c2d at org.jboss.bootstrap.spi.factory.GenericFactory.createInstance(GenericFactory.java:92) at org.jboss.bootstrap.spi.factory.ServerFactory.createServer(ServerFactory.java:83) at org.jboss.Main.boot(Main.java:356) at org.jboss.Main$1.run(Main.java:707) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.ClassNotFoundException: org.jboss.bootstrap.impl.as.server.JBossASServerImpl at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at org.jboss.bootstrap.spi.factory.GenericFactory.createInstance(GenericFactory.java:88) ... 4 more The lib directory contains jars with full name; e.g. jboss-classloading-vfs-2.0.7.CR2. Is this part of mvn refactoring or is it just me?