How do I use startFastOperations()?

I have the professional version of the grid (//v.1.5 build 71114).



I included dhtmlx/dhtmlxGrid/codebase/ext/dhtmlxgrid_fast.js in my jsp.



But when I call



userGrid.startFastOperations();



I get a Runtime Error that says “Object doesn’t support this property or method”.



Could you please tell me what I’m doing wrong?

Actually, you are doing all correctly.
Please be sure that dhtmlxgrid_fast.js file is really loaded by mentioned url, there is no any other requirements

If problem still occurs for you - please provide used js code.
( the package contains sample of functionality usage     -        dhtmlxgrid\samples\rows_columns_manipulations\pro_fast_row_adding.html )