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### Running command:
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###   /Library/Frameworks/R.framework/Versions/Current/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data QUALIFIER
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* checking for file ‘QUALIFIER/DESCRIPTION’ ... OK
* preparing ‘QUALIFIER’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘QUALIFIER.Rmd’ using rmarkdown
Loading required package: flowCore
Loading required package: flowViz
Loading required package: lattice
Loading required package: ncdfFlow
Loading required package: RcppArmadillo
Loading required package: BH
Loading required package: flowWorkspace
As part of improvements to flowWorkspace, some behavior of
GatingSet objects has changed. For details, please read the section
titled "The cytoframe and cytoset classes" in the package vignette:

  vignette("flowWorkspace-Introduction", "flowWorkspace")
Loading required package: data.table
Loading required package: reshape

Attaching package: 'reshape'

The following object is masked from 'package:data.table':

    melt

Quitting from lines 125-130 (QUALIFIER.Rmd) 
Error: processing vignette 'QUALIFIER.Rmd' failed with diagnostics:
error in evaluating the argument 'object' in selecting a method for function 'pData': external pointer is not valid
--- failed re-building ‘QUALIFIER.Rmd’

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

Error: Vignette re-building failed.
Execution halted