Error(s) in re-building vignettes:
  ...
--- re-building 'VWPre_Basic_Preprocessing.Rmd' using rmarkdown
Loading required package: dplyr

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

This is VWPre version 1.2.1. See NEWS for important changes. 
For package information, type 'help(package="VWPre")'. 
To cite this package, type 'citation(package="VWPre")'.
--- finished re-building 'VWPre_Basic_Preprocessing.Rmd'

--- re-building 'VWPre_Interest_Areas.Rmd' using rmarkdown
Loading required package: dplyr

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

This is VWPre version 1.2.1. See NEWS for important changes. 
For package information, type 'help(package="VWPre")'. 
To cite this package, type 'citation(package="VWPre")'.
Warning: `data_frame()` is deprecated, use `tibble()`.
This warning is displayed once per session.
--- finished re-building 'VWPre_Interest_Areas.Rmd'

--- re-building 'VWPre_Message_Alignment.Rmd' using rmarkdown
Loading required package: dplyr

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

This is VWPre version 1.2.1. See NEWS for important changes. 
For package information, type 'help(package="VWPre")'. 
To cite this package, type 'citation(package="VWPre")'.
--- finished re-building 'VWPre_Message_Alignment.Rmd'

--- re-building 'VWPre_Plotting.Rmd' using rmarkdown
Loading required package: dplyr

Attaching package: 'dplyr'

The following object is masked from 'package:nlme':

    collapse

The following object is masked from 'package:gridExtra':

    combine

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

This is VWPre version 1.2.1. See NEWS for important changes. 
For package information, type 'help(package="VWPre")'. 
To cite this package, type 'citation(package="VWPre")'.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Event means.
Grand average calculated using Subject means.
Grand average of Difference calculated using Event means.
Grand average of Difference calculated using Event means.
Grand average of difference between EN3 and CH1 calculated using Subject means.
Surface calculated using Event means.
Quitting from lines 247-250 (VWPre_Plotting.Rmd) 
Error: processing vignette 'VWPre_Plotting.Rmd' failed with diagnostics:
WEIRD RETURN VALUE: 0x5
--- failed re-building 'VWPre_Plotting.Rmd'

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

Error: Vignette re-building failed.
Execution halted