I am running 4.01 and I started get this exception on a new piece of code: java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.CompilationResult .getProblems()[Lorg/eclipse/jdt/core/compiler/CategorizedProblem; at org.drools.commons.jci.compilers.EclipseJavaCompiler$3.acceptResult(E clipseJavaCompiler.java:335) at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:335) at org.drools.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJ avaCompiler.java:372) at org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(Abstrac tJavaCompiler.java:51) at org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDiale ct.java:332) at org.drools.compiler.DialectRegistry.compileAll(DialectRegistry.java:6 0) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:287 ) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.j ava:160) at com.acs.gs.juror.workflow.RulesBasedWorkflowManager.init(RulesBasedWo rkflowManager.java:114) It is blowing up on this line of code: builder.addPackageFromDrl( new StringReader(drl) ); Which is the drl created from the spreadsheet compiler on the decision table. This rules class has been tested thoroughly under junit. It wasn't until I deployed the library into my webapp that this issue turned up. Does anyone have any idea what I should be doing next? Thanks. Thom Hehl Sr. eJuror Architect * Office (859) 277-8800 x 144 * Thomas.Hehl(a)acs-inc.com <mailto:Thomas.Hehl@acs-inc.com> ACS, Inc. Government Solutions 1733 Harrodsburg Road Lexington, KY 40504-3617 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message and notify sender via e-mail at Thomas.Hehl(a)acs-inc.com <mailto:Thomas.Hehl@acs-inc.com> or by telephone at 859-277-8800 ext. 144. Thank you.