[rules-users] Exception in thread "main" java.lang.Error: Unable to find unambiguously defined class

Hi, I have a simple rule that references a "Process" fact:- package com.ford.nges.jboss.rules import com.ford.nges.om.Constants import com.ford.nges.om.Component import com.ford.nges.om.ResourceEntry import com.ford.nges.om.Process import com.ford.nges.om.Machine rule "A rule" when p:Process( ) then System.out.println(p.toString()); end However I receive the following error on builder.addPackageFromDrl(new InputStreamReader(Main.class.getResourceAsStream("rules.drl"))); even though I have an import statement. Exception in thread "main" java.lang.Error: Unable to find unambiguously defined class 'Process', candidates are: [java.lang.Process, com.ford.nges.om.Process] at org.drools.semantics.java.ClassTypeResolver.resolveType(Unknown Source) at org.drools.semantics.java.RuleBuilder.build(Unknown Source) at org.drools.semantics.java.RuleBuilder.build(Unknown Source) at org.drools.semantics.java.RuleBuilder.build(Unknown Source) at org.drools.compiler.PackageBuilder.addRule(Unknown Source) at org.drools.compiler.PackageBuilder.addPackage(Unknown Source) at org.drools.compiler.PackageBuilder.addPackageFromDrl(Unknown Source) at com.ford.nges.Main.main(Main.java:43) If "Process" is referred to in the RHS or the Class name is not Process I don't get the error. Any thoughts? With kind regards, Michael Anstis ------------------------------------------- Next Generation Estimating System * Trafford House (Int) 8 718 2239 * Trafford House (Ext) +44 (0)1268 702239 * <mailto:manstis1@ford.com>