I need to get row index from a rich datatable and use it in my code to get some results. I searched forum and google it is said that I need to use UIData and bind it to datatable.

After I did this, I started get the error below

binding="#{invoiceHome.issueData}": Target Unreachable, identifier 'invoiceHome' resolved to null

This is my code

<rich:dataTable id="receiptList" var="ii"
value="#{invoiceHome.instance.itemInvoice}" binding="#{invoiceHome.issueData}" >

private UIData issueData;
public UIData getIssueData() {

return issueData;
     }
public void setIssueData(UIData issueData) {
this.issueData = issueData;
     }     

What is wrong with my code? Is there another way to retrieve row index?