# Including a file with relative path

I'm trying to include a file whose path relative to the main tex file is `../folder/chapter.tex`. I tried

``````\input{../folder/chapter.tex}
``````

but it doesn't work: I get an error of file not found. I'm using MikTex 2.9 under Windows.

• You know it should be `\input{../folder/chapter.tex}` (i.e. braces not parentheses) right? – Ian Thompson Mar 10 '15 at 22:25
• Relative paths up forbidden? i.e. `..` in every case. – Johannes_B Mar 10 '15 at 22:27
• Sorry, I fail to see the difference. If you refer to the curly braces, I have already edited them in the question (I typed regular parentheses by accident, I have curly braces in my document, sorry about that). – Simone Mar 10 '15 at 22:27
• @Johannes_B You can normally read from up: it's writing that's forbidden. With `\input` that should be OK, but `\include` would fail. – Joseph Wright Mar 10 '15 at 22:38
• @JosephWright Ah, ok. That somehow slipped my mind at this hour. Thanks for clarification. – Johannes_B Mar 10 '15 at 22:40

After some testing from the command line using xelatex.exe, it seems to be the case that Latex requires the relative paths in your source files to be defined relative to the folder in which the Latex compiler is executed (not relative to the location of your main Latex file). This actually makes a fair bit of sense. These relative paths aren't being passed to your main Latex file; they're being passed to the Latex compiler. It will interpret relative paths in relation to where it was invoked.

Since you're using a GUI, I have no idea what MikTeX considers to be the folder in which the Latex compiler is executed.

I see two different solutions:

One, abandon relative paths and use absolute paths. You can even include the drive letter. Just remember to keep on using Latex's preferred forward slashes for the directory levels, for example:

``````\input{C:/project/latexfiles/mychapter.tex}
``````

Two, you can start compiling from the command line. Keep a DOS box open to the folder where your main Latex file lives. When you're ready to compile, run the command to do so. Here are the parameters I use:

``````xelatex -synctex=-1 -shell-escape -halt-on-error mymainfile.tex
``````

When I need to recompile, I go to the DOS box and press up to get the last command, then I hit return. Very convenient. You can of course use pdflatex.exe or whichever Latex compiler you need, and you can google to learn more about the various command line parameters and their effects.

• You're right about paths: this is exactly why my command failed. I'm not fond of using relative paths, but after all it may not be too bad. A way to use paths that are relative to the main tex file is the `import` package. – Simone Mar 11 '15 at 21:04
• This is no longer true with `\input`, at least with XeLaTex from TeXLive 2015. Relative paths are fine. I am not sure about `\include`, though. I'm having some trouble with it .... – Mars May 14 at 0:44
• @Mars What specifically are you saying is no longer true? I suggested absolute paths as an easy solution to his problem. Relative paths are also a fine solution as long as you know from which directory they are relative. – Tim Stewart May 14 at 3:27
• Tim, I think that I may have misunderstood "requires the relative paths in your source files to be defined relative to the folder in which the Latex compiler is executed". I took that to mean "relative to the location of the executable". I now think you probably mean "relative to the current working directory when the latex command is executed." I always run `xelatex` relative to where the main file I'm compiling is located, and my `\input` paths are always relative to that. (If that's what you meant--I now think it is--maybe a small clarification would be worthwhile.) – Mars May 14 at 14:31
• Ah, I see it now. – Mars May 15 at 2:02