I'm guessing but I suspect the problem is with what a table cell contains. You are trying to get the text from a table cell which ends with two characters unlikely to be allowed in file names.
Table cells always end with a paragraph mark and an end-of-cell mark. If you trim them off before assigning the rest of the text to the filename you might have more luck
Code:
fName = ActiveDocument.Paragraphs(8).Range
fName = Left(fName,Len(fName)-2) 'add this line