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

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at org.kuali.kfs.module.purap.document.validation.impl.PurchaseOrderQuoteListRule.processAddCollectionLineBusinessRules(
at org.kuali.rice.kns.rule.event.KualiAddLineEvent.invokeRuleMethod(
at org.kuali.rice.krad.service.impl.KualiRuleServiceImpl.applyRules(
at org.kuali.rice.kns.web.struts.action.KualiMaintenanceDocumentAction.addLine(

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