[NTG-context] call of string.match() inside \ctxlua{}

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