Horizontal rule in R Markdown / Bookdown causing errors

Question

Suddenly, I run into an error when knitting to PDF in Markdown/Bookdown. Nothing about my system has changed.

The error is being caused by a \'horzontal rule\' i.e

Answer 1

So, a temporary solution, that worked for me, until a more permanent solution is found is:

\begin{center}\rule{3in}{0.4pt}\end{center}

Used this instead of --- or ***

Answer 2

Update: this issue has been fixed in rmarkdown v2.1, and should disappear if you (re)install the latest version of rmarkdown from CRAN.

---

This is a known and fixed bug now in pandoc. https://github.com/jgm/pandoc/issues/5801

it happened with newer version of TexLive.

This will be fixed in next pandoc version. You'll have to wait or use the nightly build.

you can also use a trick for now by adding this in the header of tex document.

\renewcommand{\linethickness}{0.05em}

With rmarkdown you can do

---
title: "Untitled"
output: 
  pdf_document:
    keep_tex: true
    includes:
      in_header: header.tex
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```


```{cat, engine.opts = list(file = "header.tex")}
\renewcommand{\linethickness}{0.05em}
```


lalalala

---

lilili

you can also write the header.tex file manually, or add it to your template.

This works for me.