R-markdown error when knitting to pdf

[anhclerkin]

I'm relatively new to programming and taking courses on R, using Positron on R-4.4.1 & Quarto, tinytex is installed (when checking with sys.which('pdflatex'), there's a directory output)

When trying to knit an .rmd file to pdf (latex), I'm encountering the bellow error in the Terminal output:

processing file: HW_temp.rmd
1/7
2/7 [unnamed-chunk-1]
3/7
4/7 [unnamed-chunk-2]
5/7
6/7 [unnamed-chunk-3]
7/7
output file: HW_temp.knit.md

output-file: HW_temp.tex
standalone: true
pdf-engine: xelatex
variables:
graphics: true
tables: true
default-image-extension: pdf

metadata
documentclass: scrartcl
classoption:
- DIV=11
- numbers=noendperiod
papersize: letter
header-includes:
- '\KOMAoption{captions}{tableheading}'
block-headings: true

Rendering PDF
running xelatex - 1
command xelatex not found, attempting install
finding package for xelatex

1 package to install
installing xelatex (1 of 1)
ERROR: [non-error-thrown] tlmgr returned a non zero status code
The system cannot find the path specified.

Stack trace:
The system cannot find the path specified.

at Command.handleError (file:///C:/Users/anhcl/AppData/Local/Programs/Quarto/bin/quarto.js:8184:126)
at Command.parseCommand (file:///C:/Users/anhcl/AppData/Local/Programs/Quarto/bin/quarto.js:7909:18)
at eventLoopTick (ext:core/01_core.js:153:7)
at async quarto (file:///C:/Users/anhcl/AppData/Local/Programs/Quarto/bin/quarto.js:118224:9)
at async file:///C:/Users/anhcl/AppData/Local/Programs/Quarto/bin/quarto.js:118244:9
at async mainRunner (file:///C:/Users/anhcl/AppData/Local/Programs/Quarto/bin/quarto.js:118128:9)

[prubin]

The output contains the following: pdf-engine: xelatex. This is overriding the default choice of pdflatex as the LaTeX engine. By any chance does your document contain a header specifying xelatex? If so, changing it to pdflatex (or just omitting the line and defaulting to pdflatex) should fix the problem.

[anhclerkin]

Thanks for the response!

There is no header in this document (see screenshot)

Other than this, what would prompt xelatex to override the default choice?

I tried to look in settings, under render options, but didn't recognize anything that explicitly reference latex options (I wouldn't trust my discerning of what I see though, because I dont know what I dont know)

[FJCC]

At the top of an Rmd document that I render to pdf, I have a header like this:

---
output:
  pdf_document:
    latex_engine: pdflatex
  fig_caption: yes
geometry:
  - top=1.8cm
  - left=2cm
  - bottom=1.5cm
  - right=2cm
  - paper=a4paper
header-includes:
  - \usepackage{lscape}
---

I suggest you try doing that using only the first three lines (output:, pdf_document:, latex_engine: pdflatex) and also include the three dashes before and after that. Be sure to do the indentation correctly.