Error(s) in re-building vignettes:
  ...
--- re-building ‘PupilPre_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

Loading required package: rlang
Loading required package: VWPre
This is VWPre version 1.2.4. See NEWS for important changes. 
For package information, type 'help(package="VWPre")'. 
To cite this package, type 'citation(package="VWPre")'.
This is PupilPre version 0.6.2. See NEWS for important changes. 
For package information, type 'help(package="PupilPre")'. 
To cite this package, type 'citation(package="PupilPre")'.
Quitting from lines 320-325 (PupilPre_Basic_Preprocessing.Rmd) 
Error: processing vignette ‘PupilPre_Basic_Preprocessing.Rmd’ failed with diagnostics:
non-numeric argument to binary operator
--- failed re-building ‘PupilPre_Basic_Preprocessing.Rmd’

--- re-building ‘PupilPre_Cleanup.Rmd’ using rmarkdown
Marking data points outside of 1920x1080.

Recoding pupil size data.

1.02% of data marked as off-screen
Quitting from lines 176-181 (PupilPre_Cleanup.Rmd) 
Error: processing vignette ‘PupilPre_Cleanup.Rmd’ failed with diagnostics:
non-numeric argument to binary operator
--- failed re-building ‘PupilPre_Cleanup.Rmd’

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

Running cleanup based on MAD (median absolute deviation) and robust Mahalanobis distance.
Quitting from lines 18-34 (PupilPre_Interpolation_and_Filtering.Rmd) 
Error: processing vignette ‘PupilPre_Interpolation_and_Filtering.Rmd’ failed with diagnostics:
non-numeric argument to binary operator
--- failed re-building ‘PupilPre_Interpolation_and_Filtering.Rmd’

--- re-building ‘PupilPre_Message_Alignment.Rmd’ using rmarkdown
Checking required columns...
    All required columns are present in the data.
Checking optional columns...
    All optional columns are present in the data.
Working on required columns...
    RECORDING_SESSION_LABEL renamed to Subject. 
    item renamed to Item.
    Subject converted to factor.
    LEFT_PUPIL_SIZE converted to numeric.
    LEFT_GAZE_X converted to numeric.
    LEFT_GAZE_Y converted to numeric.
    LEFT_IN_BLINK converted to numeric.
    LEFT_IN_SACCADE converted to numeric.
    LEFT_ACCELERATION_X converted to numeric.
    LEFT_ACCELERATION_Y converted to numeric.
    LEFT_VELOCITY_X converted to numeric.
    LEFT_VELOCITY_Y converted to numeric.
    RIGHT_PUPIL_SIZE converted to numeric.
    RIGHT_GAZE_X converted to numeric.
    RIGHT_GAZE_Y converted to numeric.
    RIGHT_IN_BLINK converted to numeric.
    RIGHT_IN_SACCADE converted to numeric.
    RIGHT_ACCELERATION_X converted to numeric.
    RIGHT_ACCELERATION_Y converted to numeric.
    RIGHT_VELOCITY_X converted to numeric.
    RIGHT_VELOCITY_Y converted to numeric.
    TIMESTAMP converted to numeric.
    TRIAL_INDEX converted to numeric.
    Event variable created from Subject and TRIAL_INDEX
Working on optional columns...
    SAMPLE_MESSAGE converted to factor.
    EYE_TRACKED converted to factor.
--- finished re-building ‘PupilPre_Message_Alignment.Rmd’

--- re-building ‘PupilPre_Plotting.Rmd’ using rmarkdown
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 between EN3 and CH1 calculated using Subject means.
Surface calculated using Event means.
Surface calculated using Event means.
Grand average calculated using Subject means.
--- finished re-building ‘PupilPre_Plotting.Rmd’

SUMMARY: processing the following files failed:
  ‘PupilPre_Basic_Preprocessing.Rmd’ ‘PupilPre_Cleanup.Rmd’
  ‘PupilPre_Interpolation_and_Filtering.Rmd’

Error: Vignette re-building failed.
Execution halted