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Argument cannot be null
java.lang.IllegalArgumentException: Argument cannot be null	at org.eclipse.swt.SWT.error(	at org.eclipse.swt.SWT.error(	at org.eclipse.swt.SWT.error(	at org.eclipse.swt.widgets.Widget.error(	at org.eclipse.swt.widgets.Text.setText(	at	at	at org.eclipse.jface.wizard.Wizard.createPageControls(	at org.eclipse.jface.wizard.WizardDialog.createPageControls(	at org.eclipse.jface.wizard.WizardDialog.createContents(	at org.eclipse.jface.window.Window.create(	at org.eclipse.jface.dialogs.Dialog.create(