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### Running command:
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###   chmod a+r h5vc -R && F:\biocbuild\bbs-3.20-bioc\R\bin\R.exe CMD build --keep-empty-dirs --no-resave-data h5vc
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* checking for file 'h5vc/DESCRIPTION' ... OK
* preparing 'h5vc':
* checking DESCRIPTION meta-information ... OK
* cleaning src
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building 'h5vc.simple.genome.browser.Rmd' using rmarkdown
[WARNING] This document format requires a nonempty <title> element.
  Please specify either 'title' or 'pagetitle' in the metadata,
  e.g. by using --metadata pagetitle="..." on the command line.
  Falling back to 'h5vc.simple.genome.browser.knit'
--- finished re-building 'h5vc.simple.genome.browser.Rmd'

--- re-building 'h5vc.tour.Rmd' using rmarkdown

Quitting from lines 234-254 [unnamed-chunk-1] (h5vc.tour.Rmd)
Error: processing vignette 'h5vc.tour.Rmd' failed with diagnostics:
Failed to parse URL: Bad scheme
--- failed re-building 'h5vc.tour.Rmd'

SUMMARY: processing the following file failed:
  'h5vc.tour.Rmd'

Error: Vignette re-building failed.
Execution halted