After running a potable water facility damage analysis and trying to edit the style i receive an exception of:

java.lang.NumberFormatException: For input string: "Expression.NIL"
at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
at sun.misc.FloatingDecimal.parseDouble(Unknown Source)
at java.lang.Double.parseDouble(Unknown Source)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.SymbolEditor.handle(SymbolEditor.java:119)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.SymbolEditor.handleStyleUpdate(SymbolEditor.java:129)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.SymbolizerEditor.addEditor(SymbolizerEditor.java:230)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.PointSymbolizerEditor.internalBuild(PointSymbolizerEditor.java:73)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.SymbolizerEditor.build(SymbolizerEditor.java:187)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.SimpleStyleEditorBuilder.addSymbolizerEditor(SimpleStyleEditorBuilder.java:91)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.BaseStyleEditorBuilder.update(BaseStyleEditorBuilder.java:206)
at edu.illinois.ncsa.ergo.gis.style.ui.builders.BaseStyleEditorBuilder.setLayer(BaseStyleEditorBuilder.java:105)
at edu.illinois.ncsa.ergo.gis.style.ui.views.StyleEditorView.internalSetLayer(StyleEditorView.java:228)
at edu.illinois.ncsa.ergo.gis.style.ui.views.StyleEditorView.setLayer(StyleEditorView.java:162)
at edu.illinois.ncsa.ergo.gis.style.ui.actions.EditStyle.wrappedRun(EditStyle.java:57)
at edu.illinois.ncsa.ergo.gis.ui.actions.LayerAction.run(LayerAction.java:57)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:247)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565)
at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4410)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4228)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3816)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:687)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at edu.illinois.ncsa.incore.rcp.Application.start(Application.java:33)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
at org.eclipse.equinox.launcher.Main.main(Main.java:1492)