Trace below:

java.lang.NullPointerException
at ncsa.gis.ui.util.DNDUtils.getDatasetsFromProperties(DNDUtils.java:67)
at ncsa.gis.ui.util.DNDUtils.getDatasetsFromProperties(DNDUtils.java:80)
at ncsa.analysis.ui.widgetbuilders.MultipleDatasetWidgetBuilder$1.drop(MultipleDatasetWidgetBuilder.java:110)
at org.eclipse.swt.dnd.DNDListener.handleEvent(DNDListener.java:90)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1125)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1110)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:951)
at org.eclipse.swt.dnd.DropTarget.drag_data_received(DropTarget.java:365)
at org.eclipse.swt.dnd.DropTarget.Drag_Data_Received(DropTarget.java:246)
at org.eclipse.swt.internal.gtk.OS._gtk_drag_get_data(Native Method)
at org.eclipse.swt.internal.gtk.OS.gtk_drag_get_data(OS.java:4360)
at org.eclipse.swt.dnd.DropTarget.drag_drop(DropTarget.java:410)
at org.eclipse.swt.dnd.DropTarget.Drag_Drop(DropTarget.java:253)
at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)
at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:5593)
at org.eclipse.swt.widgets.Display.eventProc(Display.java:1192)
at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:1487)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2969)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at ncsa.maeviz.rcp.Application.run(Application.java:29)
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.internal.app.EclipseAppContainer.callMethod(EclipseAppContainer.java:572)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:171)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
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:508)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
at org.eclipse.equinox.launcher.Main.main(Main.java:1148)