Unable to find class 'ksLoggers.newFileLogger' ---------------------------------------------- Key: DROOLS-4430 URL: https://issues.jboss.org/browse/DROOLS-4430 Project: Drools Issue Type: Bug Environment: Windows 1 w/ JDK-12.02, Eclipse Reporter: Stephen Kaisler Assignee: Mario Fusco Priority: Major Attachments: MsgreClass NotFound Exception.docx, MsgreClass NotFound Exception.docx java.lang.ClassNotFoundException: Unable to find class 'ksLoggers.newFileLogger' at org.kie.soup.project.datamodel.commons.types.ClassTypeResolver.resolveType(ClassTypeResolver.java:268) at org.kie.soup.project.datamodel.commons.types.ClassTypeResolver.resolveType(ClassTypeResolver.java:153) at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.processGlobals(KnowledgeBuilderImpl.java:1686) at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.processOtherDeclarations(KnowledgeBuilderImpl.java:1668) at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.buildOtherDeclarations(KnowledgeBuilderImpl.java:2511) at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.buildPackagesWithoutRules(KnowledgeBuilderImpl.java:2458) at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.buildPackages(KnowledgeBuilderImpl.java:2449) at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:108) at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:100) at org.drools.compiler.kie.builder.impl.AbstractKieProject.buildKnowledgePackages(AbstractKieProject.java:261) at org.drools.compiler.kie.builder.impl.AbstractKieModule.buildKnowledgePackages(AbstractKieModule.java:201) at org.drools.compiler.kie.builder.impl.AbstractKieModule.createKieBase(AbstractKieModule.java:215) at org.drools.compiler.kie.builder.impl.KieContainerImpl.createKieBase(KieContainerImpl.java:406) at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:374) at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBaseFromKieSessionModel(KieContainerImpl.java:575) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:551) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:458) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:441) at CAKnowledgeBase.CAKB.initializeRuleEngine(CAKB.java:269) at chemistryAdvisor.ChemistryAdvisor.main(ChemistryAdvisor.java:217) SOurce code: try { // define a KieModule //KieModuleModel CAproj = ks.newKieModuleModel(); // get a container for the KieBases chemistryAdvisorSession = CAks.newKieClasspathContainer().newKieSession(); if (debugKB) { System.out.println("\ninitialized KieContainer:\t" + CAContainer); } } catch (NoClassDefFoundError fe) { fe.printStackTrace(); } where CAks is a KieSession.