Unable to clear ListGrid with 2000 rows

Hi,

I am using SmartGWT Power version 4.1. I am unable to clear listgrid which has grouping with more than 2000 rows.

I am using the following code.

listGrid.setData(new ListGridRecord[] {});
listGrid.redraw();

But it throws JavaScriptException sometimes.
com.google.gwt.core.client.JavaScriptException: (TypeError) @com.google.gwt.core.client.impl.Impl::apply(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)([JavaScript object(25665), JavaScript object(25664), JavaScript object(26036)]): _20 is null

Please suggest.