Error(s) in re-building vignettes:
  ...
--- re-building 'GADMTools_GRAPHICS.Rmd' using rmarkdown
Loading required package: sp
Loading required package: classInt
Loading required package: sf
Linking to GEOS 3.11.0, GDAL 3.5.1, PROJ 9.0.1; sf_use_s2() is TRUE
Loading required package: rgdal
Please note that rgdal will be retired by the end of 2023,
plan transition to sf/stars/terra functions using GDAL and PROJ
at your earliest convenience.

rgdal: version: 1.5-32, (SVN revision 1176)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 3.5.1, released 2022/06/30
Path to GDAL shared files: /usr/share/gdal
 GDAL does not use iconv for recoding strings.
GDAL binary built with GEOS: TRUE 
Loaded PROJ runtime: Rel. 9.0.1, June 15th, 2022, [PJ_VERSION: 901]
Path to PROJ shared files: /home/hornik/.local/share/proj:/usr/share/proj
PROJ CDN enabled: FALSE
Linking to sp version:1.5-0
To mute warnings of possible GDAL/OSR exportToProj4() degradation,
use options("rgdal_show_exportToProj4_warnings"="none") before loading sp or rgdal.

Attaching package: 'GADMTools'

The following object is masked from 'package:utils':

    vignette

old-style crs object detected; please recreate object with a recent sf::st_crs()
old-style crs object detected; please recreate object with a recent sf::st_crs()
old-style crs object detected; please recreate object with a recent sf::st_crs()
old-style crs object detected; please recreate object with a recent sf::st_crs()
Joining, by = "NAME_4"
old-style crs object detected; please recreate object with a recent sf::st_crs()
old-style crs object detected; please recreate object with a recent sf::st_crs()
old-style crs object detected; please recreate object with a recent sf::st_crs()
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
--- finished re-building 'GADMTools_GRAPHICS.Rmd'

--- re-building 'GADMTools_ISO_3166-1_alpha-3.Rmd' using rmarkdown
Quitting from lines 19-27 (GADMTools_ISO_3166-1_alpha-3.Rmd) 
Error: processing vignette 'GADMTools_ISO_3166-1_alpha-3.Rmd' failed with diagnostics:
input string 6 is invalid
--- failed re-building 'GADMTools_ISO_3166-1_alpha-3.Rmd'

--- re-building 'GADMTools_Manipulating_Shapefiles.Rmd' using rmarkdown
Warning: attribute variables are assumed to be spatially constant throughout all geometries
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
--- finished re-building 'GADMTools_Manipulating_Shapefiles.Rmd'

SUMMARY: processing the following file failed:
  'GADMTools_ISO_3166-1_alpha-3.Rmd'

Error: Vignette re-building failed.
Execution halted