Dear Sirs

A have a string where I need to extract one number. But every time I run
this code I found this error message: [ctxlua]:1: unfinished string near
<eof>

\usemodule[scancsv]

\def\licann#1{% #1 - lesson number with strings
    \ctxlua{parsedate=thirddata.scancsv.ParseCSVLine('#1','n.º');%
     local Nlic=(parsedate[2]);%
   Nlic=tonumber(string.match(Nlic, '%d+'));%
     context(Nlic ~=0 and 1 or  0)}}

\starttext

\licann{"lesson nº456Alterada"}

\stoptext


thanks in advance

Have a nice day

jorge