Hi, I am running into a strange classloader issue when running test cases in Ant. Outside of Ant, the test cases and application itself just run fine. It's only when I attempt to run the test case from within Ant that I get the error below: Drools 5.0.1 Ant 1.6 JUnit 4.7 <testcase classname="com.siemens.pl.it.gre.rules.TestJUnit" name="testRule" time="1.75"> <error message="TestObject (wrong name: com/siemens/pl/it/gre/rules/TestObject)" type="java.lang.NoClassDefFoundError">java.lang.NoClassDefFoundError: TestObject (wrong name: com/siemens/pl/it/gre/rules/TestObject) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at org.drools.rule.CompositeClassLoader.loadClass(CompositeClassLoader.java:61) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:144) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:140) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:104) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:68) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1159) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:649) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25) at com.siemens.pl.it.gre.rules.AbstractRulesTestCase.createRuleBase(AbstractRulesTestCase.java:62) at com.siemens.pl.it.gre.rules.TestJUnit.setUp(TestJUnit.java:21) </error> Ant snippet: <target name="unitTest2"> <junit fork="yes"> <classpath> <path refid="classpath" /> </classpath> <formatter type="xml" /> <test name="com.siemens.pl.it.gre.rules.TestJUnit" haltonfailure="yes" outfile="${test.reports.dir}/results"> <formatter type="xml" /> </test> </junit> </target> Turning the "fork" option off has no effect. Example rule: package com.siemens.pl.it.rules.test import com.siemens.pl.it.gre.rules.TestObject; rule "Is Value 'foo'?" when $testObj : TestObject( value == "foo" ) then $testObj.setResult(true); end Interestingly, if I fully-qualify the class in LHS like this: com.siemens.pl.it.rules.test.TestObject( value == "foo" ), the test runs just fine though I would prefer not to have to do this in all my rules if at all possible. Thanks, -scott