i followed this code sample from the website:
but it failed with...........
Failed to convert xx.pdf: ArguArg_ParamName_Name, index: at System.ThrowHelper.ThrowArgumentOutOfRange_IndexMustBeLessExcept
at Spire.Pdf.Widget.PdfPageCollection.spra(Int32) + 0x37
at Spire.Pdf.PdfDocumentBase.spra(Int32, Int32, Int32) + 0xd5
at Spire.Pdf.PdfDocument.SaveAsImage(Int32) + 0x69
at Spire.Pdf.AOT.NLPdfDocument.PdfDocument_SaveAsImage(IntPtr, Int32, IntPtr) + 0x52
pdf2image also has a problem with these large PDFs and cannot convert them. Any tips? Thank you