_sRow' is null or not an object

Iam using the arrow keys to navigate through the grid, but when iam at the first row (index 0) of the grid and click the up arrow key iam getting an error ‘_sRow’ is null or not an object in dhtmlxgrid.js file. Why is this happening?

Problem can’t be reconstructed with latest code. Please try to download latest build from dhtmlx.com and use it ( or you can contact us directly at support@dhtmlx.com , we will send you latest version of js file )