[rules-users] PackageBuilder fail with java.lang.ExceptionInInitializerError

Hi, when I try PackageBuilder builder = new PackageBuilder(); I running this in JbossEclipse, I can run the examples without trouble, but in a new project I get this error. Exception in thread "main" java.lang.ExceptionInInitializerError at org.drools.compiler.PackageBuilder.loadCompiler(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at nova.common.session.GenericSession.configTaskData(GenericSession.java:220) at nova.common.session.GenericSession.initSession(GenericSession.java:73) at nova.test.entity.client.TestFrameTask.initSession(TestFrameTask.java:268) at nova.common.task.FrameTask.init(FrameTask.java:12) at nova.test.entity.client.TestFrameTask.init(TestFrameTask.java:90) at nova.common.task.SimpleLauncher.launchTask(SimpleLauncher.java:65) at nova.common.task.SimpleLauncher.main(SimpleLauncher.java:25) Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) (Caused by org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException)) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351) at org.apache.commons.jci.compilers.EclipseJavaCompiler.<clinit>(EclipseJavaCompiler.java:52) ... 10 more Caused by: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:397) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529) ... 14 more Caused by: java.lang.NullPointerException at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:374) ... 15 more Greetings