stellina_rosa [http://community.jboss.org/people/stellina_rosa] created the discussion "Where is the problem? In the file or in the installation?" To view the discussion, visit: http://community.jboss.org/message/595731#595731 -------------------------------------------------------------- Hello everybody! I've installed JBPM5 (i followed the instruction on this community) and i tried to execute the "HelloProcess".. but there is an error: java.lang.IllegalArgumentException: Unable to instantiate service for Class 'org.drools.compiler.BPMN2ProcessProvider'           at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:162)           at org.drools.compiler.BPMN2ProcessFactory.loadProvider(BPMN2ProcessFactory.java:29)           at org.drools.compiler.BPMN2ProcessFactory.getBPMN2ProcessProvider(BPMN2ProcessFactory.java:21)           at org.drools.compiler.BPMN2ProcessFactory.configurePackageBuilder(BPMN2ProcessFactory.java:12)           at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:469)           at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)           at com.sample.ProcessTest.readKnowledgeBase(ProcessTest.java:33)           at com.sample.ProcessTest.main(ProcessTest.java:20) Caused by: java.lang.IllegalArgumentException: Unable to instantiate 'org.jbpm.bpmn2.BPMN2ProcessProviderImpl'           at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:211)           at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceRegistryImpl.java:203)           at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:160)           ... 7 more Caused by: java.lang.ClassNotFoundException: org.jbpm.bpmn2.BPMN2ProcessProviderImpl           at java.net.URLClassLoader$1.run(Unknown Source)           at java.security.AccessController.doPrivileged(Native Method)           at java.net.URLClassLoader.findClass(Unknown Source)           at java.lang.ClassLoader.loadClass(Unknown Source)           at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)           at java.lang.ClassLoader.loadClass(Unknown Source)           at java.lang.Class.forName0(Native Method)           at java.lang.Class.forName(Unknown Source)           at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:208)           ... 9 more I dont't understand it.. could anyone help me? thanks -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/595731#595731] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]