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

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java.lang.NullPointerException:
at de.ovgu.featureide.fm.core.color.FeatureColorManager.getProject(FeatureColorManager.java:296)
at de.ovgu.featureide.fm.core.color.FeatureColorManager.getCurrentColorScheme(FeatureColorManager.java:141)
at de.ovgu.featureide.fm.core.color.FeatureColorManager.getCurrentColorScheme(FeatureColorManager.java:134)
at de.ovgu.featureide.fm.core.color.FeatureColorManager.getColor(FeatureColorManager.java:63)
at de.ovgu.featureide.fm.ui.views.outline.FmLabelProvider.getBackground(FmLabelProvider.java:121)
at de.ovgu.featureide.ui.views.collaboration.outline.FMOutlineLabelProviderWrapper.getBackground(FMOutlineLabelProviderWrapper.java:112)
at org.eclipse.jface.viewers.WrappedViewerLabelProvider.getBackground(WrappedViewerLabelProvider.java:91)
at org.eclipse.jface.viewers.WrappedViewerLabelProvider.update(WrappedViewerLabelProvider.java:149)
at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:154)
at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:949)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)
at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:1029)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)
at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2176)
at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2755)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1916)
at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:684)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1891)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1848)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1834)
at org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:1526)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1462)
at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:366)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1423)
at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1523)
at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:522)
at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1482)
at org.eclipse.jface.viewers.ContentViewer.setLabelProvider(ContentViewer.java:323)
at org.eclipse.jface.viewers.StructuredViewer.setLabelProvider(StructuredViewer.java:2222)
at de.ovgu.featureide.ui.views.collaboration.outline.Outline$12.runInUIThread(Outline.java:596)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4155)
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:380)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
at org.eclipse.equinox.launcher.Main.run(Main.java:1515)

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