Is there any way to get Drools flow to use the GroovyClassLoader to load Groovy classes? I am trying the following unsuccessfully. Setting the GroovyClassLoader GroovyClassLoader gcl = new GroovyClassLoader(); gcl.addClasspath("c:\\temp\\"); //the com.datacert.apps.sampleapplication.models.Person Groovy class is in c:\temp KnowledgeBuilderConfiguration conf = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null, gcl); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(conf); Flow Definition RuleFlowProcessFactory factory = RuleFlowProcessFactory.createProcess(_processName); int nodeCount = 1; factory.name("Migration Approval Flow").version("1.0").packageName("com.datacert").variable("entity", new ObjectDataType("com.datacert.apps.sampleapplication.models.Person")).var iable("entityId", new ObjectDataType(String.class.getCanonicalName())).variable("currentApprov erName", Runtime error in JBoss 10:55:17,982 ERROR [[WorkflowServer]] Servlet.service() for servlet WorkflowServer threw exception com.datacert.core.common.exception.BaseApplicationException: org.drools.RuntimeDroolsException: Unable to resolve class 'com.datacert.apps.sampleapplication.models.Person' for identifier 'entity at com.datacert.core.operations.service.impl.OperationService.invokeOperati on(OperationService.java:57) at com.datacert.core.presentation.presenter.impl.ScreenPresenter.performOpe ration(ScreenPresenter.java:521) at com.datacert.core.presentation.presenter.impl.ScreenPresenter.performOpe ration(ScreenPresenter.java:483) at com.datacert.core.presentation.controller.springmvc.impl.ItemScreenRende rController.performOperation(ItemScreenRenderController.java:426) at com.datacert.core.presentation.controller.springmvc.impl.ItemScreenRende rController.performItemScreenOperation(ItemScreenRenderController.java:1 12) at com.datacert.core.presentation.controller.springmvc.impl.ItemScreenRende rController.performOperation(ItemScreenRenderController.java:205) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav a:39) Thanks, Todd