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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 BiocFileCache
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* checking for file ‘BiocFileCache/DESCRIPTION’ ... OK
* preparing ‘BiocFileCache’:
* checking DESCRIPTION meta-information ... OK
* installing the package (it is needed to build vignettes)
* creating vignettes ... ERROR
--- re-building ‘BiocFileCache.Rmd’ using rmarkdown

Quitting from BiocFileCache.Rmd:206-221 [bfcaddremote]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `.util_download()`:
! bfcadd() failed; see warnings()
---
Backtrace:
    ▆
 1. ├─BiocFileCache::bfcadd(bfc, "TestWeb", fpath = url)
 2. └─BiocFileCache::bfcadd(bfc, "TestWeb", fpath = url)
 3.   └─BiocFileCache:::.util_download(...)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'BiocFileCache.Rmd' failed with diagnostics:
bfcadd() failed; see warnings()
--- failed re-building ‘BiocFileCache.Rmd’

--- re-building ‘BiocFileCache_Troubleshooting.Rmd’ using rmarkdown
--- finished re-building ‘BiocFileCache_Troubleshooting.Rmd’

--- re-building ‘BiocFileCache_UseCases.Rmd’ using rmarkdown
--- finished re-building ‘BiocFileCache_UseCases.Rmd’

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

Error: Vignette re-building failed.
Execution halted