splitAt error (invalid argument)

I am using dhtmlx 1.5 professional and when I use splitAt() function I am getting invalid argument error.

When I try to work examples in the document they are not working also…

I also include dhtmlxgrid_splt.js…

Can you help me…

Thanks…

Please be sure that splitAt command called after structure of grid initialized and before data loaded in grid.
support@dhtmlx.com )