ASPxGridView - “parameter name: index” error

Question

Does anyone know what does means "parameter name: index" error while performing callback on the aspxgridview ? When I run the grid.PerformCallback() command, I see this error.

Note: my callback function

protected void grid_CustomCallback(object sender, DevExpress.Web.ASPxGridView.ASPxGridViewCustomCallbackEventArgs e)
{
    grid.DataBind();
}

Answer 1

May be a little late for OP but what solved this for me was to set EnableSynchronization = false for the control that I was adding items in through javascript.

Clarification:

I was adding items to a combobox through the cbFormattingOption.InsertItem(i, v); method. Setting EnableSynchronization to false false for that combobox solved this issue.