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

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java.lang.NullPointerException:
at org.springframework.ide.eclipse.beans.ui.editor.util.BeansEditorUtils.getFile(BeansEditorUtils.java:766)
at org.springframework.ide.eclipse.beans.ui.editor.hover.BeansTextHoverProcessor.computeTagAttValueHelp(BeansTextHoverProcessor.java:135)
at org.springframework.ide.eclipse.beans.ui.editor.hover.BeansTextHoverProcessor.computeRegionHelp(BeansTextHoverProcessor.java:123)
at org.springframework.ide.eclipse.beans.ui.editor.hover.BeansTextHoverProcessor.computeHoverHelp(BeansTextHoverProcessor.java:96)
at org.springframework.ide.eclipse.beans.ui.editor.hover.BeansTextHoverProcessor.getHoverInfo(BeansTextHoverProcessor.java:60)
at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:168)

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