rnCancelled"  value="#{commonReport.purchaseReturnCancel.bills}" var="b1"  
                                     rendered="#{commonReport.purchaseReturnCancel.bills.size()!=0}" >
                            <f:facet name="header">  
                                <h:outputLabel value="Cancelled GRN Return "/>
                            </f:facet> 

                            <p:column headerText="Cancelled NO" >
                                <f:facet name="header">  
                                   