PDF SaveAsTIFF Not working


I have a PDF file that works fine in reader, I can send it as an email attachment, save it to disk reads fine. When I try to save it as TIFF it bombs.

Error: Object reference not set to an instance of an object.

at #=zwDke0qLP6_TZqOtxwhERJTp6UcTa6x9rSg==.#=zz0_DJQs=()
at #=zwDke0qLP6_TZqOtxwhERJTp6UcTa6x9rSg==.#=zVSPGEZAq5Fo8(Int32 #=z0zdEIRA9EUxI, Int32& #=zkeAgoKLQjNud)
at #=zwDke0qLP6_TZqOtxwhERJTp6UcTa6x9rSg==.#=zu_woWKA=(Int32 #=z0zdEIRA9EUxI)
at Aspose.Pdf.PageCollection.#=z8ptdGYBwmJRgbl0quYl63gs=(Int32 #=zUuFS314=)
at Aspose.Pdf.PageCollection.#=zG3HHHx0=(Int32 #=zUuFS314=)
at Aspose.Pdf.Devices.TiffDevice.Process(Document document, Int32 fromPage, Int32 toPage, Stream output)
at Aspose.Pdf.Facades.PdfConverter.SaveAsTIFF(Stream outputStream, PageSize pageSize, TiffSettings settings)
at Aspose.Pdf.Facades.PdfConverter.SaveAsTIFF(String outputFile, PageSize pageSize, TiffSettings settings)
at RmolTest.Program.PDFtoTIFList(String rmolid, String inPDF, Dictionary`2 Settings) in C:\Users\U332309\Desktop\2dsr_Apps\RmolTest\Program.cs:line 144


Here is the file

RM06392042.pdf (1.6 KB)


Here is the code used:

public static bool PDFtoTIFList(string rmolid, string inPDF, Dictionary<string, string> Settings) {
  int fid = 0;
  var retData = new List<string>();
  Aspose.Imaging.Cache.CacheType = CacheType.CacheOnDiskOnly;
  Aspose.Imaging.Cache.CacheFolder = Settings["RMOLTemp"];
  try {
    var outTIF = string.Format("{0}{1}_{2:D2}.tif", Settings["RMOLTemp"], rmolid, ++fid);
    using (Aspose.Pdf.Facades.PdfConverter pdfC = new Aspose.Pdf.Facades.PdfConverter()) {
      Resolution res = new Resolution(300, 300);
      pdfC.Resolution = res;
      TiffSettings ts = new TiffSettings();
      ts.Depth = ColorDepth.Format1bpp;
      ts.Compression = CompressionType.CCITT4;
      pdfC.SaveAsTIFF(outTIF, Aspose.Pdf.PageSize.A4, ts);
  } catch (Exception ex) {
    ex = ex;
  return true;




Thank you for contacting support.

We have worked with the data shared by you and have been able to reproduce the issue in our environment. A ticket with ID PDFNET-46507 has been logged in our issue management system for further investigation and resolution. The ticket ID has been linked with this thread so that you will receive notification as soon as the ticket is resolved.

We are sorry for the inconvenience.


Any response yet??




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My supervisor asked me to clarify. When you pay the yearly subscription is there no “Paid Support” included? We have had 2 issues in the 3 years we have been using and both issues turned out to be real issues that only helps Aspose to fix.




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