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### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data metabolomicsWorkbenchR
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* checking for file ‘metabolomicsWorkbenchR/DESCRIPTION’ ... OK
* preparing ‘metabolomicsWorkbenchR’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘Introduction_to_metabolomicsWorkbenchR.Rmd’ using rmarkdown
--- finished re-building ‘Introduction_to_metabolomicsWorkbenchR.Rmd’

--- re-building ‘example_using_structToolbox.Rmd’ using rmarkdown
Quitting from lines 125-143 (example_using_structToolbox.Rmd) 
Error: processing vignette 'example_using_structToolbox.Rmd' failed with diagnostics:
invalid class "mv_feature_filter" object: The required package "pmp" is not installed.
--- failed re-building ‘example_using_structToolbox.Rmd’

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

Error: Vignette re-building failed.
Execution halted