Error(s) in re-building vignettes:

[metalwings-design]

Hello,

--- re-building 'Introduction.Rmd' using rmarkdown Quitting from lines 33-34 (Introduction.Rmd) Error: processing vignette 'Introduction.Rmd' failed with diagnostics: The function xfun::isFALSE() will be deprecated in the future. Please consider using base::isFALSE(x) or identical(x, FALSE) instead. --- failed re-building 'Introduction.Rmd'

SUMMARY: processing the following file failed: 'Introduction.Rmd'

above error occured in part of code:

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

What shall i do in thispart of code?

---

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[yihui]

Some package(s) must be too old (you didn't provide session info as requested by the issue guide below your post). Anyway, when in doubt, try to update software packages.

update.packages(ask = FALSE, checkBuilt = TRUE)

[metalwings-design]

problem solved with knitr package update,thanks for response.