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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 UCell
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* checking for file ‘UCell/DESCRIPTION’ ... OK
* preparing ‘UCell’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘UCell_Seurat.Rmd’ using rmarkdown
Performing log-normalization
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[----|----|----|----|----|----|----|----|----|----|
**************************************************|
Calculating gene variances
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[----|----|----|----|----|----|----|----|----|----|
**************************************************|
Calculating feature variances of standardized and clipped values
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[----|----|----|----|----|----|----|----|----|----|
**************************************************|

  |                                                                            
  |                                                                      |   0%
  |                                                                            
  |======================================================================| 100%
Using method 'umap'
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[----|----|----|----|----|----|----|----|----|----|
**************************************************|
2024-07-17 18:45:32.734 R[80040:402193204] XType: com.apple.fonts is not accessible.
2024-07-17 18:45:32.734 R[80040:402193204] XType: XTFontStaticRegistry is enabled.
--- finished re-building ‘UCell_Seurat.Rmd’

--- re-building ‘UCell_sce.Rmd’ using rmarkdown

Quitting from lines 64-73 [unnamed-chunk-4] (UCell_sce.Rmd)
Error: processing vignette 'UCell_sce.Rmd' failed with diagnostics:
the condition has length > 1
--- failed re-building ‘UCell_sce.Rmd’

--- re-building ‘UCell_vignette_basic.Rmd’ using rmarkdown
--- finished re-building ‘UCell_vignette_basic.Rmd’

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

Error: Vignette re-building failed.
Execution halted