Hi Eytanes,
We are unable to reproduce the issue mentioned by you. Please use the attached latest version Aspose.Cells5.1.4.5. We are sending you the Excel file that contains the pivot table and the output pdf file for your consideration. If you face any difficulty, please feel free to contact us.
Following code snippet has been used to generate the output.
string inputName = @"C:\\excelTrash\\pivot.xlsx";
string outputName = @"C:\\excelTrash\\pivot_output";
ImageOrPrintOptions outputOptions = new ImageOrPrintOptions();
outputOptions.ImageFormat = System.Drawing.Imaging.ImageFormat.Bmp;
Workbook book = new Workbook(inputName);
Worksheet objworksheet = book.Worksheets["Sheet2"];
Aspose.Cells.Rendering.SheetRender sheetRender = new Aspose.Cells.Rendering.SheetRender(objworksheet, outputOptions);
sheetRender.ToImage(0, outputName);
//////////////////////////////////////////////////////
Workbook book = new Workbook(inputName);
book.Save(outputName, SaveFormat.Pdf);
Thanks,