Generating "zero" as value for a solved grid

[ma-altaiir]

Hello;
Solver may sometimes generate a "zero" value in cell , here are some Logs :
E/GENERATED: 273598146598146273146273598725389461389461725461725389932857614857614932614932857
E/GENERATED: 217586439586439217439217586125768394768394125394125768872651943651943872943872651
E/GENERATED: 491753286753286491286491753947135862135862947862947135514379628379628514628514370
E/GENERATED: 574296831296831574831574296752469318469318752318752469945627183627183945183945627
E/GENERATED: 725941836941836725836725941279514368514368279368279514457192683192683457683457192
E/GENERATED: 836294175294175836175836294382649751649751382751382649968423517423517968517968423
E/GENERATED: 738152964152964738964738152371825649825649371649371825587213496213496587496587213
E/GENERATED: 239741865741865239865239741327914658914658327658327914492173586173586492586492170

After many tests, i noticed that the zero generated in some grids is always in the last cell {8,8} , i did not encountered yet any zero generated in other positions.

I think the issue come from the fact that solver uses values from 1 to 9 including the EMPTY value wich is zero (solver.java line 52)

[GiulioImperato]

replace the line 61 in Solver.java with int[] values = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

[kuldeepiitg]

Hello,

It looks like a few of the cells are left empty by Solver.

In this case, the bottom-right cell is empty. In a few other examples, I found two empty cells.

Can you please let me know the solution if it is a known one?