Hi Lloyd, I think os:command doesn't exist. If I try this, I get the same error: 7> os:gargantua(pdflatex --shell-escape tex/oblivious.tex). * 1:38: syntax error before: tex Have you tried > os:cmd("pdflatex --shell-escape tex/oblivious.tex"). regards, Dieter On 02.04.21 19:05, Lloyd R. prentice wrote: > os:command(pdflatex --shell-escape tex/oblivious.tex).