java.lang.NullPointerException: This exception has no message.

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This exception has no message.
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.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.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.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 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)

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