Hello, I have an object with a timestamp field which I declared this way in my rule file: /declare VpAction @role( event ) @timestamp ( myGregorianCalendar.getTimeInMillis()) end / where myGregorianCalendar is from type java.util.GregorianCalendar. Using the rule file in my application works fine (and the timestamp of the events is recognized correctly, comparisons of events like 'before' and 'after' work too), but when I try setting a breakpoint within this rule file, I get an exception (see below). Nevertheless the breakpoint appears as 'set'. But when I debug my application as a drools application, all breakpoints of my rule file are skipped, so debugging is impossible. My other rule files don't have event declarations and the exception doesn't appear there and the rules there are debuggable. Any ideas? Thanks in advance! Here is the exception: /!SUBENTRY 1 org.drools.eclipse 4 0 2011-09-20 22:27:47.251 !MESSAGE Cannot determine ruleInfo L/RulesDepotConf/GarmischRulesConf/rules/ValidationEarLeavingActions.drl 69 !STACK 0 org.drools.RuntimeDroolsException: Field/method 'zeitStempel.getTimeInMillis()' not found for class 'e.ar.data.VpAction' at org.drools.base.ClassFieldAccessorFactory.getClassFieldReader(ClassFieldAccessorFactory.java:136) at org.drools.base.ClassFieldAccessorCache$CacheEntry.getReadAccessor(ClassFieldAccessorCache.java:169) at org.drools.base.ClassFieldAccessorCache.getReadAcessor(ClassFieldAccessorCache.java:102) at org.drools.base.ClassFieldAccessorStore.wire(ClassFieldAccessorStore.java:419) at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:118) at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:95) at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:1553) at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:985) at org.drools.compiler.PackageBuilder.newPackage(PackageBuilder.java:973) at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:1439) at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:985) at org.drools.compiler.PackageBuilder.newPackage(PackageBuilder.java:973) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:686) at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:439) at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:360) at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:273) at org.drools.eclipse.debug.core.DroolsLineBreakpoint.setJavaBreakpointProperties(DroolsLineBreakpoint.java:90) at org.drools.eclipse.debug.core.DroolsDebugTarget.breakpointAdded(DroolsDebugTarget.java:91) at org.eclipse.debug.internal.core.BreakpointManager$BreakpointNotifier.run(BreakpointManager.java:920) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.debug.internal.core.BreakpointManager$BreakpointNotifier.notify(BreakpointManager.java:946) at org.eclipse.debug.internal.core.BreakpointManager.fireUpdate(BreakpointManager.java:860) at org.eclipse.debug.internal.core.BreakpointManager.addBreakpoints(BreakpointManager.java:579) at org.eclipse.debug.internal.core.BreakpointManager.addBreakpoints(BreakpointManager.java:549) at org.eclipse.debug.internal.core.BreakpointManager.addBreakpoint(BreakpointManager.java:542) at org.eclipse.jdt.internal.debug.core.breakpoints.JavaBreakpoint.register(JavaBreakpoint.java:194) at org.eclipse.jdt.internal.debug.core.breakpoints.JavaLineBreakpoint$1.run(JavaLineBreakpoint.java:150) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975) at org.eclipse.debug.core.model.Breakpoint.run(Breakpoint.java:335) at org.eclipse.jdt.internal.debug.core.breakpoints.JavaLineBreakpoint.<init>(JavaLineBreakpoint.java:153) at org.drools.eclipse.debug.core.DroolsLineBreakpoint.<init>(DroolsLineBreakpoint.java:58) at org.drools.eclipse.editors.DroolsLineBreakpointAdapter.toggleLineBreakpoints(DroolsLineBreakpointAdapter.java:93) at org.eclipse.debug.ui.actions.ToggleBreakpointAction.run(ToggleBreakpointAction.java:106) at org.eclipse.ui.texteditor.AbstractTextEditor$14.triggerAction(AbstractTextEditor.java:2909) at org.eclipse.ui.texteditor.AbstractTextEditor$14.mouseDoubleClick(AbstractTextEditor.java:2934) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:189) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575) at org.eclipse.equinox.launcher.Main.run(Main.java:1408) !ENTRY org.eclipse.jdt.debug 4 125 2011-09-20 22:27:56.287 !MESSAGE Internal error logged from JDI Debug: !STACK 0 org.drools.RuntimeDroolsException: Field/method 'zeitStempel.getTimeInMillis()' not found for class 'e.ar.data.VpAction' at org.drools.base.ClassFieldAccessorFactory.getClassFieldReader(ClassFieldAccessorFactory.java:136) at org.drools.base.ClassFieldAccessorCache$CacheEntry.getReadAccessor(ClassFieldAccessorCache.java:169) at org.drools.base.ClassFieldAccessorCache.getReadAcessor(ClassFieldAccessorCache.java:102) at org.drools.base.ClassFieldAccessorStore.wire(ClassFieldAccessorStore.java:419) at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:118) at org.drools.base.ClassFieldAccessorStore.getReader(ClassFieldAccessorStore.java:95) at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:1553) at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:985) at org.drools.compiler.PackageBuilder.newPackage(PackageBuilder.java:973) at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:1439) at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:985) at org.drools.compiler.PackageBuilder.newPackage(PackageBuilder.java:973) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:686) at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:439) at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:360) at org.drools.eclipse.DroolsEclipsePlugin.parseResource(DroolsEclipsePlugin.java:273) at org.drools.eclipse.debug.core.DroolsLineBreakpoint.setJavaBreakpointProperties(DroolsLineBreakpoint.java:90) at org.drools.eclipse.debug.core.DroolsDebugTarget.breakpointRemoved(DroolsDebugTarget.java:481) at org.eclipse.debug.internal.core.BreakpointManager$BreakpointNotifier.run(BreakpointManager.java:923) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.debug.internal.core.BreakpointManager$BreakpointNotifier.notify(BreakpointManager.java:946) at org.eclipse.debug.internal.core.BreakpointManager.fireUpdate(BreakpointManager.java:860) at org.eclipse.debug.internal.core.BreakpointManager.removeBreakpoints(BreakpointManager.java:471) at org.eclipse.debug.internal.core.BreakpointManager.removeBreakpoint(BreakpointManager.java:450) at org.eclipse.debug.core.model.Breakpoint.delete(Breakpoint.java:122) at org.drools.eclipse.editors.DroolsLineBreakpointAdapter.toggleLineBreakpoints(DroolsLineBreakpointAdapter.java:86) at org.eclipse.debug.ui.actions.ToggleBreakpointAction.run(ToggleBreakpointAction.java:106) at org.eclipse.ui.texteditor.AbstractTextEditor$14.triggerAction(AbstractTextEditor.java:2909) at org.eclipse.ui.texteditor.AbstractTextEditor$14.mouseDoubleClick(AbstractTextEditor.java:2934) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:189) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575) at org.eclipse.equinox.launcher.Main.run(Main.java:1408)/ -- View this message in context: http://drools.46999.n3.nabble.com/Exception-when-trying-to-find-a-field-w... 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