Compilation error due to lineno package

[urdh]

I think this is a skdoc issue rather than an skmath issue.

./skmath.w18)) (/usr/local/texlive/2016/texmf-dist/tex/latex/lineno/lineno.sty

! LaTeX Error: Command \c@linenumber already defined.
               Or name \end... illegal, see p.192 of the manual.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...

l.1584 \newcounter{linenumber}

!  ==> Fatal error occurred, no output PDF file produced!