Hi, The command-line option -no-file-line-error behaves exactly the same as -file-line-error. hironobu$ cat test.tex \x hironobu$ echo x | luatex test This is LuaTeX, Version 1.10.0 (TeX Live 2020/dev) restricted system commands enabled. (./test.tex ! Undefined control sequence. l.1 \x ? warning (pdf backend): no pages of output. Transcript written on test.log. hironobu$ echo x | luatex -file-line-error test This is LuaTeX, Version 1.10.0 (TeX Live 2020/dev) restricted system commands enabled. (./test.tex ./test.tex:1: Undefined control sequence. l.1 \x ? warning (pdf backend): no pages of output. Transcript written on test.log. hironobu$ echo x | luatex -no-file-line-error test This is LuaTeX, Version 1.10.0 (TeX Live 2020/dev) restricted system commands enabled. (./test.tex ./test.tex:1: Undefined control sequence. l.1 \x ? warning (pdf backend): no pages of output. Transcript written on test.log. hironobu$ Best, Hironobu