Error(s) in re-building vignettes:
--- re-building ‘access_xpdb_data.Rmd’ using rmarkdown
Returning data from run001.ext, $prob no.1, subprob no.0, method foce
Returning parameter estimates from $prob no.1, subprob no.0, method foce
--- finished re-building ‘access_xpdb_data.Rmd’

--- re-building ‘customize_plots.Rmd’ using rmarkdown
Quitting from lines 13-26 (customize_plots.Rmd) 
Error: processing vignette 'customize_plots.Rmd' failed with diagnostics:
could not find function "split_chain"
--- failed re-building ‘customize_plots.Rmd’

--- re-building ‘import_model_outputs.Rmd’ using rmarkdown
--- finished re-building ‘import_model_outputs.Rmd’

--- re-building ‘introduction.Rmd’ using rmarkdown
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
--- finished re-building ‘introduction.Rmd’

--- re-building ‘multiple_pages.Rmd’ using rmarkdown
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
Using data from $prob no.1
Filtering data by EVID == 0
`geom_smooth()` using formula 'y ~ x'
`geom_smooth()` using formula 'y ~ x'
--- finished re-building ‘multiple_pages.Rmd’

--- re-building ‘vpc.Rmd’ using rmarkdown

VPC continuous --------------------
1. Gathering data & settings
Using xpdb simulation problem 2 and observation problem 1.

2. Computing VPC data
Configuring and initializing...
Parsing observed data...
Filtering rows where EVID not 0
Parsing simulated data...
Filtering rows where EVID not 0
Binning: 0 0.66667 1.25 1.75 2.1667 3 4.3333 5 6.25 7 9
Calculating statistics for simulated data...
Quitting from lines 43-46 (vpc.Rmd) 
Error: processing vignette 'vpc.Rmd' failed with diagnostics:
could not find function "split_chain"
--- failed re-building ‘vpc.Rmd’

SUMMARY: processing the following files failed:
  ‘customize_plots.Rmd’ ‘vpc.Rmd’

Error: Vignette re-building failed.
Execution halted