@davidgohel

officedown::rpptx_documentを使用してRmdファイルを編成すると、関数は次のエラーメッセージを含む開かないpptxファイルを生成します。

PowerPoint found a problem with content in xxxx.pptx.
PowerPoint can attempt to repair the presentation.

Rmdの内容は、たとえばbookdown::powerpoint_presentation2で編むことができることを確認しました。 したがって、いくつかのバグがofficedown::rpptx_documentにあるのではないかと思います。

MWE

---
title: "Untitled"
author: "CLRR"
date: "2020/6/20"
output: 
  officedown::rpptx_document:
    keep_md: TRUE
  bookdown::powerpoint_presentation2:
    keep_md: TRUE
  ---

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

## R Markdown

This is an R Markdown presentation. Markdown is a simple formatting syntax for     authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see     <http://rmarkdown.rstudio.com>.

When you click the **Knit** button a document will be generated that includes both     content as well as the output of any embedded R code chunks within the document.

## Slide with Bullets

- Bullet 1
- Bullet 2
- Bullet 3

## Slide with R Output

```{r cars, echo = TRUE}
summary(cars)
```

## Slide with Plot

```{r pressure}
plot(pressure)
```

セッション情報

rmarkdown::pandoc_version()
[1] ‘2.9.2.1’

R version 4.0.0 (2020-04-24)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)

Matrix products: default

locale:
[1] LC_COLLATE=Japanese_Japan.932  LC_CTYPE=Japanese_Japan.932        LC_MONETARY=Japanese_Japan.932 LC_NUMERIC=C                   LC_TIME=Japanese_Japan.    932    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
Rcpp_1.0.4.6      
packrat_0.5.0     
digest_0.6.25     
R6_2.4.1          
magrittr_1.5      
officedown_0.1.0  
evaluate_0.14     
zip_2.0.4         
gdtools_0.2.2     
rlang_0.4.6       
uuid_0.1-4        
xml2_1.3.2        
rmarkdown_2.2    
tools_4.0.0       
officer_0.3.11    
xfun_0.14         
yaml_2.2.1        
compiler_4.0.0    
systemfonts_0.2.3 r
vg_0.2.4         
memoise_1.1.0     
htmltools_0.4.0   
knitr_1.28