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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 flowGate
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* checking for file ‘flowGate/DESCRIPTION’ ... OK
* preparing ‘flowGate’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘flowGate.Rmd’ using rmarkdown

Quitting from flowGate.Rmd:481-483 [unnamed-chunk-10]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `add_ggcyto()`:
! object '+.gg' not found
---
Backtrace:
     ▆
  1. ├─ggplot2::autoplot(gs[[1]], gate = "Leukocytes")
  2. └─ggcyto:::autoplot.GatingHierarchy(gs[[1]], gate = "Leukocytes")
  3.   ├─BiocGenerics::lapply(...)
  4.   └─base::lapply(...)
  5.     └─ggcyto (local) FUN(X[[i]], ...)
  6.       └─ggcyto:::autoplot.GatingSet(object, gate, y = y, ...)
  7.         ├─ggcyto::ggcyto(object, mapping, ...)
  8.         └─ggcyto:::ggcyto.GatingHierarchy(object, mapping, ...)
  9.           ├─ggcyto::ggcyto(data, ...)
 10.           └─ggcyto:::ggcyto.GatingSet(data, ...)
 11.             └─ggcyto:::ggcyto.flowSet(data = data, mapping = mapping, ...)
 12.               ├─p + ggcyto_par_default()
 13.               └─p + ggcyto_par_default()
 14.                 └─ggcyto:::add_ggcyto(e1, e2, e2name)
 15.                   ├─e1 + e2.new
 16.                   └─e1 + e2.new
 17.                     └─ggcyto:::add_ggcyto(e1, e2, e2name)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'flowGate.Rmd' failed with diagnostics:
object '+.gg' not found
--- failed re-building ‘flowGate.Rmd’

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

Error: Vignette re-building failed.
Execution halted