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java.lang.NullPointerException: 	at com.installshield.product.wizardbeans.SetVariableAction.execute(Unknown Source)	at com.installshield.wizard.StandardWizardListener.execute(Unknown Source)	at com.installshield.wizard.StandardWizardListener.currentBeanChanged(Unknown Source)	at com.installshield.wizard.Wizard$RunThread.run(Unknown Source)