eXcell is not defined error for dhtmlxgrid sub tree

Hi
When I am trying to implement the dhtmlxgrid interaction with other component example ie…

dhtmlx.com/docs/products/dhtmlxG … _tree.html

it is giving eXcell is not defined error , i have included same js and css files, it is also showing grid.setSubTree(tree, 1,0) is not a function, i want to implement same example in my code.Please help me out…

Thanks
Seenu

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