bool start_found=false;
            bool end_found = false;

            for (int i = 0; i < width; i++)
                for (int j = 0; j < height; j++)
                {
                    if (m_rectangles[i][j].boxType == BoxType.Start)
                        start_found = true;
                    if (m_rectangles[i][j].boxType == BoxType.End)
                        end_found = true;
                }
            if (!start_found || !end_found)
                return;