Error(s) in re-building vignettes:
--- re-building 'a-doc-SOMbrero-package.Rmd' using knitr
Loading required package: igraph

Attaching package: 'igraph'

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

    decompose, spectrum

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

    union

Loading required package: markdown

***********************************************************

      This is 'SOMbrero' package, v 1.4.1

Citation details with citation('SOMbrero')

Further information with help(SOMbrero)...

Use sombreroGUI() to start the Graphical Interface.

***********************************************************
--- finished re-building 'a-doc-SOMbrero-package.Rmd'

--- re-building 'b-doc-grids.Rmd' using knitr
Loading required package: igraph

Attaching package: 'igraph'

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

    decompose, spectrum

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

    union

Loading required package: markdown

***********************************************************

      This is 'SOMbrero' package, v 1.4.1

Citation details with citation('SOMbrero')

Further information with help(SOMbrero)...

Use sombreroGUI() to start the Graphical Interface.

***********************************************************
--- finished re-building 'b-doc-grids.Rmd'

--- re-building 'c-doc-numericSOM.Rmd' using knitr
Loading required package: igraph

Attaching package: 'igraph'

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

    decompose, spectrum

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

    union

Loading required package: markdown

***********************************************************

      This is 'SOMbrero' package, v 1.4.1

Citation details with citation('SOMbrero')

Further information with help(SOMbrero)...

Use sombreroGUI() to start the Graphical Interface.

***********************************************************
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in plotPrototypes(x, type, variable, my.palette, show.names, names,  :
  Hexagonal topograpy: imputing missing values to make a full squared grid

Warning: Imputing missing values.
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in png(filename = tmp_file, width = gw_pix, height = gh_pix, res = dev_dpi,  :
  'width=16, height=8' are unlikely values in pixels
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
--- finished re-building 'c-doc-numericSOM.Rmd'

--- re-building 'd-doc-korrespSOM.Rmd' using knitr
Loading required package: igraph

Attaching package: 'igraph'

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

    decompose, spectrum

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

    union

Loading required package: markdown

***********************************************************

      This is 'SOMbrero' package, v 1.4.1

Citation details with citation('SOMbrero')

Further information with help(SOMbrero)...

Use sombreroGUI() to start the Graphical Interface.

***********************************************************
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  One word could not fit on page. It has been placed at its original position.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  One word could not fit on page. It has been placed at its original position.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  One word could not fit on page. It has been placed at its original position.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  One word could not fit on page. It has been placed at its original position.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
Warning in wordcloud_boxes(data_points = points_valid_first, boxes = boxes,  :
  Some words could not fit on page. They have been placed at their original positions.
--- finished re-building 'd-doc-korrespSOM.Rmd'

--- re-building 'e-doc-relationalSOM.Rmd' using knitr
Loading required package: igraph

Attaching package: 'igraph'

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

    decompose, spectrum

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

    union

Loading required package: markdown

***********************************************************

      This is 'SOMbrero' package, v 1.4.1

Citation details with citation('SOMbrero')

Further information with help(SOMbrero)...

Use sombreroGUI() to start the Graphical Interface.

***********************************************************
--- finished re-building 'e-doc-relationalSOM.Rmd'

+-+e-doc-relationalSOM.html
SUMMARY: processing the following file failed:
  'e-doc-relationalSOM.Rmd'

Error: Vignette re-building failed.
Execution halted