Thanks for your request. I tried saving your document as PDF into a stream and it seems all works fine. Here is code I used for testing:
// Open document.
Document doc = new Document(@"Test001\WMS+Modeller+Template+NEW.doc");
// Save document as PDF into stream.
using (MemoryStream pdfStream = new MemoryStream())
doc.SaveToPdf(0, doc.PageCount, pdfStream, null);
// For testign purposes save content of stream into a file.
using (FileStream pdfFile = File.Create(@"Test001\out.pdf"))
Could you please create simple code, which will allow me to reproduce the problem or provide step-by-step manual how I can reproduce the problem on my side? I will check the problem and provide you more information.