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java.lang.NullPointerException: 	at com.bea.alsb.core.internal.variables.types.SystemVariable.getSystemVariables(Unknown Source)	at com.bea.alsb.core.internal.variables.VariableContext.intializeSystemVariables(Unknown Source)	at com.bea.alsb.core.internal.variables.VariableContext.(Unknown Source)	at com.bea.alsb.core.internal.variables.VariableService.createVariableContext(Unknown Source)	at com.bea.alsb.process.messageflow.core.source.ExpressionContextSourceNodeUtil.initialize(Unknown Source)	at com.bea.alsb.process.messageflow.core.source.ExpressionContextSourceNodeUtil.(Unknown Source)	at com.bea.alsb.process.messageflow.core.source.ContextSourceNode.getContext(Unknown Source)	at com.bea.alsb.process.messageflow.core.source.StageActionSourceNode.getContext(Unknown Source)	at com.bea.alsb.process.messageflow.core.source.StageActionSourceNode.getContext(Unknown Source)	at com.bea.alsb.process.messageflow.core.source.StageActionSourceNode.getContext(Unknown Source)	at com.bea.alsb.process.messageflow.core.properties.MessageFlowPropertySection$XPathHyperlinkListener.getContext(Unknown Source)	at com.bea.alsb.process.messageflow.core.properties.MessageFlowPropertySection$XPathHyperlinkListener.linkActivated(Unknown Source)	at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleActivate(AbstractHyperlink.java:233)	at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleMouseUp(AbstractHyperlink.java:327)	at org.eclipse.ui.forms.widgets.AbstractHyperlink.access$2(AbstractHyperlink.java:311)	at org.eclipse.ui.forms.widgets.AbstractHyperlink$4.handleEvent(AbstractHyperlink.java:125)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)	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:344)	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:622)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)