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### Running command:
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###   /home/biocbuild/R/R/bin/R CMD build --keep-empty-dirs --no-resave-data RITAN
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* checking for file ‘RITAN/DESCRIPTION’ ... OK
* preparing ‘RITAN’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘choosing_resources.Rmd’ using rmarkdown
Error: processing vignette 'choosing_resources.Rmd' failed with diagnostics:
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- failed re-building ‘choosing_resources.Rmd’

--- re-building ‘enrichment.Rmd’ using rmarkdown
Error: processing vignette 'enrichment.Rmd' failed with diagnostics:
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- failed re-building ‘enrichment.Rmd’

--- re-building ‘multi_tissue_analysis.Rmd’ using rmarkdown
Error: processing vignette 'multi_tissue_analysis.Rmd' failed with diagnostics:
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- failed re-building ‘multi_tissue_analysis.Rmd’

--- re-building ‘resource_relationships.Rmd’ using rmarkdown
Error: processing vignette 'resource_relationships.Rmd' failed with diagnostics:
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- failed re-building ‘resource_relationships.Rmd’

--- re-building ‘subnetworks.Rmd’ using rmarkdown
Error: processing vignette 'subnetworks.Rmd' failed with diagnostics:
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- failed re-building ‘subnetworks.Rmd’

SUMMARY: processing the following files failed:
  ‘choosing_resources.Rmd’ ‘enrichment.Rmd’ ‘multi_tissue_analysis.Rmd’
  ‘resource_relationships.Rmd’ ‘subnetworks.Rmd’

Error: Vignette re-building failed.
Execution halted