Error(s) in re-building vignettes:
  ...
--- re-building ‘Develop_and_Use_the_dmdScheme.Rmd’ using rmarkdown

#############################################
The cache will be in a temporary location and be deleted when you quit R.
It is located at
   /home/hornik/tmp/scratch/RtmpBjOK6t/dmdScheme_32b169455be3
To make it permanent, call
   cache(createPermanent = TRUE)
and restart R
and a permanent cache will be created which will survive restarts.
#############################################


trying URL ‘https://github.com/Exp-Micro-Ecol-Hub/dmdSchemeRepository/raw/master/schemes/dmdScheme_0.9.9.tar.gz’
Content type 'application/octet-stream' length 39383 bytes (38 KB)
==================================================
downloaded 38 KB

Scheme definition `/home/hornik/tmp/scratch/RtmpBjOK6t/file32b14d0ace31/dmdScheme_0.9.9.tar.gz, installed with
name:    dmdScheme
version: 0.9.9
Theme switched to dmdScheme_0.9.9
trying URL ‘https://github.com/Exp-Micro-Ecol-Hub/dmdSchemeRepository/raw/master/schemes/SCHEME_DEFINITIONS.yaml’
Content type 'text/plain; charset=utf-8' length 590 bytes
==================================================
downloaded 590 bytes

trying URL ‘https://github.com/Exp-Micro-Ecol-Hub/dmdSchemeRepository/raw/master/schemes/emeScheme_0.9.5.tar.gz’
Content type 'application/octet-stream' length 129249 bytes (126 KB)
==================================================
downloaded 126 KB

trying URL ‘https://github.com/Exp-Micro-Ecol-Hub/dmdSchemeRepository/raw/master/schemes/emeScheme_0.9.5.tar.gz’
Content type 'application/octet-stream' length 129249 bytes (126 KB)
==================================================
downloaded 126 KB

Quitting from lines 227-228 (Develop_and_Use_the_dmdScheme.Rmd) 
Error: processing vignette 'Develop_and_Use_the_dmdScheme.Rmd' failed with diagnostics:
unable to install packages
--- failed re-building ‘Develop_and_Use_the_dmdScheme.Rmd’

SUMMARY: processing the following file failed:
  ‘Develop_and_Use_the_dmdScheme.Rmd’

Error: Vignette re-building failed.
Execution halted