Let the following minimal example:
\documentclass[12pt]{article}
\begin{document}
\input{toto}
\end{document}
with toto.tex containing some text. Running the following:
textidote --check fr main.tex
produces:
TeXtidote v0.7.1 - A linter for LaTeX documents and others
(C) 2018-2019 Sylvain Hallé - All rights reserved
File /toto not found (skipping)
Found 0 warning(s)
Total analysis time: 0 second(s)
Everything is OK!
It cannot find toto.tex even though the PDF file is compiled correctly. Changing \input{toto} to \input{toto.tex} doesn't help. What's wrong?