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### Running command:
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###   chmod a+r SingleCellExperiment -R && C:\Users\bioctesting\bbs-3.11-bioc-testing\R\bin\R.exe CMD build --keep-empty-dirs --no-resave-data SingleCellExperiment
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* checking for file 'SingleCellExperiment/DESCRIPTION' ... OK
* preparing 'SingleCellExperiment':
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building 'devel.Rmd' using rmarkdown
Loading required package: SummarizedExperiment
Loading required package: GenomicRanges
Loading required package: stats4
Loading required package: BiocGenerics
Loading required package: parallel

Attaching package: 'BiocGenerics'

The following objects are masked from 'package:parallel':

    clusterApply, clusterApplyLB, clusterCall, clusterEvalQ,
    clusterExport, clusterMap, parApply, parCapply, parLapply,
    parLapplyLB, parRapply, parSapply, parSapplyLB

The following objects are masked from 'package:stats':

    IQR, mad, sd, var, xtabs

The following objects are masked from 'package:base':

    Filter, Find, Map, Position, Reduce, anyDuplicated, append,
    as.data.frame, basename, cbind, colnames, dirname, do.call,
    duplicated, eval, evalq, get, grep, grepl, intersect, is.unsorted,
    lapply, mapply, match, mget, order, paste, pmax, pmax.int, pmin,
    pmin.int, rank, rbind, rownames, sapply, setdiff, sort, table,
    tapply, union, unique, unsplit, which, which.max, which.min

Loading required package: S4Vectors

Attaching package: 'S4Vectors'

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

    expand.grid

Loading required package: IRanges

Attaching package: 'IRanges'

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

    windows

Loading required package: GenomeInfoDb
Loading required package: Biobase
Welcome to Bioconductor

    Vignettes contain introductory material; view with
    'browseVignettes()'. To cite Bioconductor, see
    'citation("Biobase")', and for packages 'citation("pkgname")'.

Loading required package: DelayedArray
Loading required package: matrixStats

Attaching package: 'matrixStats'

The following objects are masked from 'package:Biobase':

    anyMissing, rowMedians


Attaching package: 'DelayedArray'

The following objects are masked from 'package:matrixStats':

    colMaxs, colMins, colRanges, rowMaxs, rowMins, rowRanges

The following objects are masked from 'package:base':

    aperm, apply, rowsum

--- finished re-building 'devel.Rmd'

--- re-building 'intro.Rmd' using rmarkdown
using temporary cache C:\Users\bioctesting\bbs-3.11-bioc-testing\tmpdir\RtmpwTqk3k/BiocFileCache
snapshotDate(): 2020-04-03
see ?scRNAseq and browseVignettes('scRNAseq') for documentation
downloading 1 resources
retrieving 1 resource
Warning: download failed
  web resource path: 'https://experimenthub.bioconductor.org/fetch/2573'
  local file path: 'C:\Users\bioctesting\bbs-3.11-bioc-testing\tmpdir\RtmpwTqk3k/BiocFileCache/cdc5f673749_2573'
  reason: Internal Server Error (HTTP 500).
Warning: bfcadd() failed; resource removed
  rid: BFC3
  fpath: 'https://experimenthub.bioconductor.org/fetch/2573'
  reason: download failed
Warning: download failed
  hub path: 'https://experimenthub.bioconductor.org/fetch/2573'
  cache resource: 'EH2557 : 2573'
  reason: bfcadd() failed; see warnings()
Quitting from lines 86-89 (intro.Rmd) 
Error: processing vignette 'intro.Rmd' failed with diagnostics:
failed to load resource
  name: EH2557
  title: Allen brain Tophat counts
  reason: 1 resources failed to download
--- failed re-building 'intro.Rmd'

SUMMARY: processing the following file failed:
  'intro.Rmd'

Error: Vignette re-building failed.
Execution halted