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### Running command:
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###   /home/biocbuild/R/R/bin/R CMD build --keep-empty-dirs --no-resave-data TREG
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* checking for file ‘TREG/DESCRIPTION’ ... OK
* preparing ‘TREG’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘finding_Total_RNA_Expression_Genes.Rmd’ using rmarkdown
Could not fetch http://research.libd.org/TREG/reference/figures/TREG_cartoon.png
HttpExceptionRequest Request {
  host                 = "research.libd.org"
  port                 = 80
  secure               = False
  requestHeaders       = []
  path                 = "/TREG/reference/figures/TREG_cartoon.png"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
  proxySecureMode      = ProxySecureWithConnect
}
 ConnectionTimeout
Error: processing vignette 'finding_Total_RNA_Expression_Genes.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building ‘finding_Total_RNA_Expression_Genes.Rmd’

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

Error: Vignette re-building failed.
Execution halted