ETA: I don't know if this makes a difference, but a couple days ago, I upgraded/updated my Linux packages. I have had issues in the past where that causes some issues in R/RStudio.
Strange happenings with bookdown. Just a couple days ago, bookdown was building my book beautifully. Now, when I try to build my book, it seems that knitr::include_graphics() is creating an issue, but only if it points to an image URL.
I created a new bookdown project to see if the problem would persist; it did. bookdown built Yihui's minimal example perfectly. Then, I used knitr::include_graphics() to add an image file in the book's directory. Again, in that case, bookdown built the book, and everything worked just right. But, when I changed the image location to a URL, the error message reads:
! LaTeX Error: File `https://upload.wikimedia.org/wikipedia/commons/2/2e/Charle s_Darwin_seated_crop' not found.
Error: Failed to compile testbook.tex. See testbook.log for more info. Execution halted
Exited with status 1.
I am at a loss. The only thing I'm changing is whether the include_graphics() command is using a local file versus one at a URL. Any suggestions are appreciated. Here is my session info:
> sessionInfo()
R version 3.4.4 (2018-03-15)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Linux Mint 18
Matrix products: default
BLAS: /usr/lib/libblas/libblas.so.3.6.0
LAPACK: /usr/lib/lapack/liblapack.so.3.6.0
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=en_US.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics utils datasets grDevices
[6] methods base
other attached packages:
[1] ggthemr_1.1.0 mapdata_2.3.0
[3] maps_3.3.0 BRugs_0.9-0
[5] bookdown_0.8.2 blogdown_0.9
[7] rasterImage_0.3.0 plotrix_3.7-4
[9] rasterVis_0.45 latticeExtra_0.6-28
[11] lattice_0.20-38 gridExtra_2.3
[13] rgeos_0.4-2 dismo_1.1-4
[15] RColorBrewer_1.1-2 ggthemes_4.0.1
[17] R2OpenBUGS_3.2-3.2 popbio_2.4.4
[19] demogR_0.6.0 png_0.1-7
[21] jpeg_0.1-8 rnaturalearthhires_0.1.0
[23] rnaturalearthdata_0.1.0 rnaturalearth_0.1.0
[25] raster_2.8-4 rgdal_1.3-6
[27] scales_1.0.0 ggmap_2.7.904
[29] ggvis_0.4.4 rworldmap_1.3-7
[31] maptools_0.9-4 sp_1.3-1
[33] googlesheets_0.3.0 forcats_0.3.0
[35] stringr_1.3.1 dplyr_0.7.8
[37] purrr_0.2.5 readr_1.3.0
[39] tidyr_0.8.2 tibble_1.4.2
[41] ggplot2_3.1.0 tidyverse_1.2.1
loaded via a namespace (and not attached):
[1] nlme_3.1-137 bitops_1.0-6 sf_0.7-1
[4] lubridate_1.7.4 httr_1.4.0 tools_3.4.4
[7] backports_1.1.2 R6_2.3.0 spData_0.2.9.6
[10] DBI_1.0.0 lazyeval_0.2.1 colorspace_1.3-2
[13] withr_2.1.2 tidyselect_0.2.5 compiler_3.4.4
[16] cli_1.0.1 rvest_0.3.2 xml2_1.2.0
[19] hexbin_1.27.2 classInt_0.2-3 digest_0.6.18
[22] foreign_0.8-70 rmarkdown_1.11 pkgconfig_2.0.2
[25] htmltools_0.3.6 rlang_0.3.0.1 readxl_1.1.0
[28] rstudioapi_0.8 shiny_1.2.0 bindr_0.1.1
[31] generics_0.0.2 zoo_1.8-4 jsonlite_1.6
[34] magrittr_1.5 dotCall64_1.0-0 Rcpp_1.0.0
[37] munsell_0.5.0 yaml_2.2.0 stringi_1.2.4
[40] plyr_1.8.4 grid_3.4.4 parallel_3.4.4
[43] promises_1.0.1 crayon_1.3.4 haven_2.0.0
[46] hms_0.4.2 knitr_1.21 pillar_1.3.0
[49] boot_1.3-20 rjson_0.2.20 codetools_0.2-15
[52] glue_1.3.0 evaluate_0.12 modelr_0.1.2
[55] spam_2.2-0 httpuv_1.4.5 RgoogleMaps_1.4.3
[58] cellranger_1.1.0 gtable_0.2.0 assertthat_0.2.0
[61] xfun_0.4 mime_0.6 xtable_1.8-3
[64] broom_0.5.1 e1071_1.7-0 coda_0.19-2
[67] later_0.7.5 class_7.3-14 viridisLite_0.3.0
[70] fields_9.6 units_0.6-2 bindrcpp_0.2.2
Assuming you put
include_graphics("https://upload.wikimedia.org/wikipedia/commons/2/2e/Charles_Darwin_seated_crop.jpg")
in your document, then the issue is that LaTeX can't handle URLs. If you left the .jpg off, then that URL really doesn't exist.
You need to download the file and reference the local copy.