Though I included <%@ taglib prefix="ig" uri="http://ko.infragistics.com/faces/netadvantage"%>, I get the javascript error - 'ig' is undefined.
I am trying the examples under - \NetAdvantage for JSF\documentation\tutorials\Grid\
I had a similar error and resolved it by removing the control entirely from the page and readding it. It seems that references and or pointers weren't carried over when the control was dropped into the page.