On 29/07/2023 06:46, LARONDE Thierry wrote: > I suppose that this behavior is in LaTeX code, not an engine? No, as I have said multiple times this is not a latex issue. that text is from texlive's texmf.cnf documenting the engine level kpathsea search options. That is, it is documenting C code not macros. David Disclaimer The Numerical Algorithms Group Ltd is a company registered in England and Wales with company number 1249803. The registered office is: 30 St. Giles, Oxford, OX1 3LE, United Kingdom. Please see our Privacy Notice <https://www.nag.com/content/privacy-notice> for information on how we process personal data and for details of how to stop or limit communications from us. This e-mail has been scanned for all viruses and malware by Microsoft Exchange Online (EOP)