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### Running command:
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###   /home/biocbuild/R/R/bin/R CMD build --keep-empty-dirs --no-resave-data dar
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* checking for file ‘dar/DESCRIPTION’ ... OK
* preparing ‘dar’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘article.Rmd’ using rmarkdown
[WARNING] This document format requires a nonempty <title> element.
  Defaulting to 'article.knit' as the title.
  To specify a title, use 'title' in metadata or --metadata title="...".
--- finished re-building ‘article.Rmd’

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

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

Quitting from lines 151-166 [unnamed-chunk-6] (data_import.Rmd)
Error: processing vignette 'data_import.Rmd' failed with diagnostics:
'rank' must be a value from taxonomyRanks().
• Rename the columns from the tax_table slot of your input phyloseq with standard names.
• Standard names: Kingdom, Phylum, Class, Order, Family, Genus, Species.
--- failed re-building ‘data_import.Rmd’

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

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

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

Error: Vignette re-building failed.
Execution halted