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

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java.lang.NullPointerException:
at java.util.Hashtable.put(Hashtable.java:394)
at oracle.cabo.ui.data.DictionaryData.put(Unknown Source)
at oracle.apps.fnd.framework.about.webui.OAAboutPGCO._addDocTable(OAAboutPGCO.java:2668)
at oracle.apps.fnd.framework.about.webui.OAAboutPGCO.processRequest(OAAboutPGCO.java:690)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:600)

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