Serialize method does not return all cells

Why serialize method does not return cells of which value is zero? How to get those cells? Here is a snippet.

I apologize for the delay with the reply.
The porblem is confirmed. We’ll try to solve it in the future updates.

We have fixed the problem.
Nowe the “0” values of the spreadsheet serialize correctly.
Pleras,e tr yto updte your dhtmlxSpreadsheet to the latest version (currently it is 4.0.1) to get the fix.