I downloaded dhtmlxGrid version 4 but when i tried to use the method setValue to update a sub_row cell it does not work. Actually when the sub_row is expanded the MINUS sign changes to PLUS sign but the cell is still being expanded and the value does not update.
setValue() method works well for the subgrid cells but before the subgrid is loaded.
if the content of the subgrid is already rendered you may try use the following solution: