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java.lang.NullPointerException: parent is null	at java.awt.PopupMenu.show(Unknown Source)	at com.savvis.ui.SipListView.mousePressed(SipListView.java:322)	at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)	at java.awt.Component.processMouseEvent(Unknown Source)	at java.awt.Component.processEvent(Unknown Source)	at java.awt.Container.processEvent(Unknown Source)	at java.awt.Component.dispatchEventImpl(Unknown Source)	at java.awt.Container.dispatchEventImpl(Unknown Source)	at java.awt.Component.dispatchEvent(Unknown Source)