Intellisense not working when editing subfiles

[Nayuta7355608]

I'm working on a latex project with a multi-files structure using the subfiles package. I have some .tex files, which contains some new commands and new environments defined for the project, input in the main.tex by the marco \input. However, I find that intellisense offers auto-completion for these newly defined commands and citations only in the main file main.tex. It offers nothing about these new commands and citations when I'm editing subfiles, which are included in the main.tex using \subfile.
For the reference \ref and \eqref the intellisense works in the subfiles. The projects structure looks like this:
main.tex:

\documentclass[A4,12pt,twoside]{book}

\input{mystyle.tex}
\input{theorems.tex} 
\input{mathcommand.tex}
\begin{document}
% %--------------------------------------------------------------------------
% %         Core of the document 
% %--------------------------------------------------------------------------

\part{part1}
\subfile{files/part1/chapter1}
\subfile{files/part1/chapter2}

\part{part2}
\subfile{files/part2/chapter1}
\subfile{files/part2/chapter2}

\nocite{*} % to cite evey things, else cite each on using : \cite{ifrs17}. 
\printbibliography %to print bibliographie

\end{document}

subfiles like chapter1.tex:

% !TEX root = ../main.tex
\documentclass[../main.tex]{subfiles}
\begin{document}
contents
\end{document}

I tried adding the announcement % !TEX root = ../main.tex in the first line in subfiles, and tried the configuration variables latex-workshop.latex.texDirs and latex-workshop.latex.bibDirs. None of them makes intellisense work in subfiles

[James-Yu]

[Nayuta7355608]

Thank you for your reply! I found that I misused .../main.tex, for which I should use ../../main.tex. It should be the reason why intellisense didn't find the root file. It's also interesting that the project could be compiled successfully without correctly setting the path for main.tex in subfiles.