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

Quitting from SGSeq.Rmd:79-84 [unnamed-chunk-5]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `keepSeqlevels()`:
! could not find function "keepSeqlevels"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'SGSeq.Rmd' failed with diagnostics:
could not find function "keepSeqlevels"
--- failed re-building ‘SGSeq.Rmd’

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

Error: Vignette re-building failed.
Execution halted