Error(s) in re-building vignettes:
  ...
--- re-building ‘Bclim.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction
Warning in predictExtrapUp(alpha, lambda, beta, predictPositionsRescaled[depthIndRange],  :
  Unable to find suitable chronologies for top of core - truncated to date of extraction