Problem exporting to pdflatex

[Charles Millar <millarc@verizon.net>]

Hi,

I just upgraded via git to Emacs 25. My init file loads OK and 
everything "seems" to work, except:

Upon attempting to export to pdflatex following error results

Debugger entered--Lisp error: (wrong-type-argument arrayp nil)
   file-truename(nil)
   find-file-noselect-1(#<buffer 
Thisfiletobeexported.pdf<FilesAndFormsTemplates>> 
"/mnt/Data/ActiveFiles/FilesAndFormsTemplates/Thisfiletobeexported.pdf" 
nil nil 
"/mnt/Data/ActiveFiles/FilesAndFormsTemplates/Thisfiletobeexported.pdf" 
(17031 2057))
find-file-noselect("/mnt/Data/ActiveFiles/FilesAndFormsTemplates/Thisfiletobeexported.pdf" 
nil nil nil)
find-file-other-window("/mnt/Data/ActiveFiles/FilesAndFormsTemplates/Thisfiletobeexported.pdf")
   org-open-file("./Thisfiletobeexported.pdf")
   (if a (org-latex-export-to-pdf t s v b) (org-open-file 
(org-latex-export-to-pdf nil s v b)))
   (lambda (a s v b) (if a (org-latex-export-to-pdf t s v b) 
(org-open-file (org-latex-export-to-pdf nil s v b))))(nil nil nil nil)
   org-export-dispatch(nil)
   funcall-interactively(org-export-dispatch nil)
   call-interactively(org-export-dispatch nil nil)
   command-execute(org-export-dispatch)

LMDE Betsy

GNU Emacs 25.1.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 3.14.5) of 
2016-05-26

Org-mode version 8.3.4 (release_8.3.4-869-gf2c421 @ 
/usr/local/share/emacs/site-lisp/org-mode/lisp/)

Any help appreciated.

Charlie Millar