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### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data BUSpaRse
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* checking for file ‘BUSpaRse/DESCRIPTION’ ... OK
* preparing ‘BUSpaRse’:
* checking DESCRIPTION meta-information ... OK
* cleaning src
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘sparse-matrix.Rmd’ using rmarkdown

Quitting from lines 43-46 [unnamed-chunk-3] (sparse-matrix.Rmd)
Error: processing vignette 'sparse-matrix.Rmd' failed with diagnostics:
HTTP 500 Internal Server Error.
--- failed re-building ‘sparse-matrix.Rmd’

--- re-building ‘tr2g.Rmd’ using rmarkdown

Quitting from lines 48-51 [unnamed-chunk-3] (tr2g.Rmd)
Error: processing vignette 'tr2g.Rmd' failed with diagnostics:
Failed to perform HTTP request.
Caused by error in `curl::curl_fetch_memory()`:
! Server returned nothing (no headers, no data) [sep2019.archive.ensembl.org]: Empty reply from server
--- failed re-building ‘tr2g.Rmd’

SUMMARY: processing the following files failed:
  ‘sparse-matrix.Rmd’ ‘tr2g.Rmd’

Error: Vignette re-building failed.
Execution halted