I forgot to write gridReBind function is still working this way (I changed grid to hierarchicalgrid)

function gridReBind(data) {

$("#grid1").igHierarchicalGrid("rollback");

$("#grid1").igHierarchicalGrid('option', 'dataSource', data);
$("#grid1").igHierarchicalGrid("dataBind");
};

Hello Tsvetelina,

thank you for your help. I finally found a navigation bug which exclude ifragistics bug.

Sorry for wasting time!