This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/Debian) (format=pdflatex 2015.4.1)  2 MAY 2016 15:23
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**Ast105labmanual.tex
(/usr/share/texlive/texmf-dist/tex/latex/tools/x.tex
LaTeX2e <2011/06/27>
Babel <3.9h> and hyphenation patterns for 2 languages loaded.

! .
l.34   \batchmode \errmessage{}
                               \csname @@end\endcsname \end
This error message was generated by an \errmessage
command, so I can't give any explicit help.
Pretend that you're Hercule Poirot: Examine all clues,
and deduce the truth by order and method.

 ) 
Here is how much of TeX's memory you used:
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 260 string characters out of 6181498
 45944 words of memory out of 5000000
 3315 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 14 hyphenation exceptions out of 8191
 5i,0n,1p,99b,8s stack positions out of 5000i,500n,10000p,200000b,80000s

No pages of output.
PDF statistics:
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 1 words of extra memory for PDF output out of 10000 (max. 10000000)