I don't know if this will be useful, but... I had many problems (some really wierd ones) while my eclipse runtime had Drools 5.0.1 jars.Then I changed it to Drools 5.1.0 jars and everything started to work. Maybe you should try that! https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/t... ANA FLÁVIA FONSECA DOS SANTOS Analista de Desenvolvimento de Software PST Eletrônica S/A Phone: +55 19 3787 6379 aflavia(a)pst.com.br www.pst.com.br www.positron.com.br From: Vadivelkumar <vpalanisamy(a)apple.com&gt; To: rules-users(a)lists.jboss.org Cc: Joel Pinto <jpinto(a)apple.com&gt; Date: 25/09/2009 01:47 Subject: [rules-users] java.lang.NoSuchMethodError (org.eclipse.jdt.internal.compiler.CompilationResult.getProblems()) Sent by: rules-users-bounces(a)lists.jboss.org Hi, My Application service(Hilo) is using Jboss Server. I have used drools rule engine as part of my Application Process. I have compiled it using simple java void main class, it works fine. Then i have converted as a simple java process & Deploy as part of my application service, i'm getting below error in my stack trace. Note: 1. Drools Version 5.0 2. Eclipse Version 3.5.0 (IDE which i have used to compile) 3. I have already tried the solutions suggested in http://www.jboss.org/community/wiki/RulesTomcat . Still we are not able to resolve it? java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.CompilationResult.getProblems()[Lorg/ eclipse/jdt/core/compiler/CategorizedProblem; org.drools.commons.jci.compilers.EclipseJavaCompiler $3.acceptResult(EclipseJavaCompiler.java:321) org .eclipse .jdt.internal.compiler.Compiler.handleInternalException(Compiler.java: 415) org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:352) org .drools .commons .jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:351) org .drools .commons .jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java: 51) org .drools .rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:389) org .drools .compiler .DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java: 56) org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:74) org.drools.compiler.PackageBuilder.compileAll(PackageBuilder.java:690) org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:653) org .drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java: 290) org .drools .compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488) org .drools .builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25) It will be great, if anybody can help it. Thanks, Vadi _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users