[pdftex] New error

[Aleks Kleyn]

What does mean error 

(\end occurred when \ifx on line 11 was incomplete)
(see the transcript file for additional information)
!pdfTeX error: pdflatex (file xyd.enc): cannot open encoding file for
reading
 ==> Fatal error occurred, no output PDF file produced!

How I can fix it. Thank you

Aleks Kleyn
http://sites.google.com/site/AleksKleyn/ 
http://arxiv.org/a/kleyn_a_1  
http://AleksKleyn.blogspot.com/