If I run the following code:
    
        Code: Visual Basic.NET
        
        doc = New PdfDocument()
            result = EO.Pdf.HtmlToPdf.ConvertHtml(HTML, doc)
            doc.Save(PDFFolder & FilePrefix & "_FirstPass_Save.pdf")
            doc2 = New PdfDocument()
            result = EO.Pdf.HtmlToPdf.ConvertHtml(HTML, doc2)
            doc2.Save(PDFFolder & FilePrefix & "_FirstPass_Save2.pdf") 
     
 
The first ConvertHtml will result in my 800 page pdf as expected.
The second will get me a single blank page. 
v2015 wasn't doing this to me, but I am using a demo of version of 2017.2.43 at the moment.
- Brad