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

Quitting from lines 123-130 [London-download] (dearseqUserguide.Rmd)
Error: processing vignette 'dearseqUserguide.Rmd' failed with diagnostics:
package or namespace load failed for 'readxl' in dyn.load(file, DLLpath = DLLpath, ...):
 unable to load shared object '/Library/Frameworks/R.framework/Versions/4.4-arm64/Resources/library/readxl/libs/readxl.so':
  dlopen(/Library/Frameworks/R.framework/Versions/4.4-arm64/Resources/library/readxl/libs/readxl.so, 0x0006): Symbol not found: _iconv
  Referenced from: <FD6FB17B-8454-3F39-A16C-DE444F5ECD91> /Library/Frameworks/R.framework/Versions/4.4-arm64/Resources/library/readxl/libs/readxl.so
  Expected in:     <5071C9AE-D5F8-3824-BAFF-EA562080A74A> /Library/Frameworks/R.framework/Versions/4.4-arm64/Resources/lib/libR.dylib
--- failed re-building ‘dearseqUserguide.Rmd’

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

Error: Vignette re-building failed.
Execution halted