Error(s) in re-building vignettes:
--- re-building ‘exploratory-modelling.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.

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: ggplot2
Warning: Tried to calculate with group_by(), but the calculation failed.
Falling back to ungrouped filter operation...
label_key: id
Too many data series, skip labeling
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y,  :
  no font could be found for family "Arial"
Quitting from lines 47-56 (exploratory-modelling.Rmd) 
Error: processing vignette 'exploratory-modelling.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘exploratory-modelling.Rmd’

--- re-building ‘finding-features.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y,  :
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Quitting from lines 43-47 (finding-features.Rmd) 
Error: processing vignette 'finding-features.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘finding-features.Rmd’

--- re-building ‘getting-started.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
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Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y,  :
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Quitting from lines 62-67 (getting-started.Rmd) 
Error: processing vignette 'getting-started.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘getting-started.Rmd’

--- re-building ‘id-interesting-obs.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
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Quitting from lines 61-70 (id-interesting-obs.Rmd) 
Error: processing vignette 'id-interesting-obs.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘id-interesting-obs.Rmd’

--- re-building ‘longitudinal-data-structures.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘longitudinal-data-structures.Rmd’

--- re-building ‘mixed-effects-models.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Loading required package: Matrix

Attaching package: 'modelr'

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

    heights

Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Quitting from lines 38-47 (mixed-effects-models.Rmd) 
Error: processing vignette 'mixed-effects-models.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘mixed-effects-models.Rmd’

--- re-building ‘visualisation-gallery.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
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Warning in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y,  :
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Quitting from lines 39-51 (visualisation-gallery.Rmd) 
Error: processing vignette 'visualisation-gallery.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘visualisation-gallery.Rmd’

SUMMARY: processing the following files failed:
  ‘exploratory-modelling.Rmd’ ‘finding-features.Rmd’
  ‘getting-started.Rmd’ ‘id-interesting-obs.Rmd’
  ‘mixed-effects-models.Rmd’ ‘visualisation-gallery.Rmd’

Error: Vignette re-building failed.
Execution halted