Error in re-building vignettes:
  ...
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in grep("\n", x) : input string 33 is invalid in this locale
Warning in grep("\n", x) : input string 73 is invalid in this locale
Warning in grep("\n", x) : input string 290 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 33 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 73 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 290 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 33 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 73 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 290 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 33 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 73 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 290 is invalid in this locale
Package 'Sim.DiffProc', version 4.3
browseVignettes('Sim.DiffProc') for more informations.
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in dnorm(x, mean = x0 + A(t0, x0, theta) * dt, sd = sqrt(dt) * S(t0,  :
  NaNs produced
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in grep("\n", x) : input string 199 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 199 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 199 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 199 is invalid in this locale
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in grep("\n", x) : input string 146 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 146 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 146 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 146 is invalid in this locale
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in grep("\n", x) : input string 28 is invalid in this locale
Warning in grep("\n", x) : input string 53 is invalid in this locale
Warning in grep("\n", x) : input string 98 is invalid in this locale
Warning in grep("\n", x) : input string 117 is invalid in this locale
Warning in grep("\n", x) : input string 135 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 28 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 53 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 98 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 117 is invalid in this locale
Warning in grep("^(---|\\.\\.\\.)\\s*$", lines) :
  input string 135 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 28 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 53 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 98 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 117 is invalid in this locale
Warning in grepl(chunk.begin, lines) :
  input string 135 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 28 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 53 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 98 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 117 is invalid in this locale
Warning in grepl(chunk.end, lines) :
  input string 135 is invalid in this locale
Warning in grepl(rc, x) : input string 4 is invalid in this locale
Warning in grepl("^\\s*$", x) :
  input string 4 is invalid in this locale
Warning in grep("\n", x) : input string 4 is invalid in this locale
Quitting from lines 50-57 (snssde.Rmd) 
Error: processing vignette 'snssde.Rmd' failed with diagnostics:
input string 4 is invalid UTF-8
Execution halted