Thank you for considering Aspose.
I am not able to reproduce this error with the following code. Please use Aspose.Words.Document instead of Aspose.Words.Word. Please check with the below code and also let me knew which version of Aspose.Pdf and Aspose.Words you are using.
Aspose.Words.Document doc = new Aspose.Words.Document(@“C:\Source Word doc.doc”);
doc.Save(@“C:\Source Word doc.doc.xml”, SaveFormat.AsposePdf);
Pdf pdf = new Pdf();
pdf.BindXML(@“C:\Source Word doc.doc.XML”, null);
pdf.IsTruetypeFontMapCached = true;
pdf.TruetypeFontMapPath = Path.GetTempPath();
pdf.Save(@“C:\Source Word doc.doc.pdf”);