Package check result: ERROR

Check: re-building of vignette outputs, Result: ERROR
  Error(s) in re-building vignettes:
    ...
  --- re-building ‘introduction.Rmd’ using rmarkdown
  Building shared library for Rcpp code chunk...
  Building shared library for Rcpp code chunk...
  Building shared library for Rcpp code chunk...

Check: for detritus in the temp directory, Result: NOTE
  Found the following files/directories:
    ‘ccepwxYW.s’

No changes to worse in reverse depends.