Error(s) in re-building vignettes:
  ...
--- re-building ‘advanced_examples.Rmd’ using rmarkdown

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

You specified `aggregate = TRUE`. Aggregation is only possible
            over a common reference year: The `fill_gaps` parameter will be
            forced to `TRUE`
You specified `aggregate = TRUE`. Aggregation is only possible
            over a common reference year: The `fill_gaps` parameter will be
            forced to `TRUE`
You specified `aggregate = TRUE`. Aggregation is only possible
            over a common reference year: The `fill_gaps` parameter will be
            forced to `TRUE`
--- finished re-building ‘advanced_examples.Rmd’

--- re-building ‘povcalnetR.Rmd’ using rmarkdown
Quitting from lines 54-59 (povcalnetR.Rmd) 
Error: processing vignette 'povcalnetR.Rmd' failed with diagnostics:
'You cannot download this file' does not exist in current working directory ('/home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/povcalnetR.Rcheck/vign_test/povcalnetR/vignettes').
--- failed re-building ‘povcalnetR.Rmd’

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

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

Warning: 107 parsing failures.
row                                            col           expected     actual         file
  7 NA                                             1 columns          4 columns  literal data
 23 NA                                             1 columns          15 columns literal data
 43 NA                                             1 columns          3 columns  literal data
 48 NA                                             1 columns          5 columns  literal data
 50 <div class="mynode errorembed"><!DOCTYPE html> delimiter or quote :          literal data
... .............................................. .................. .......... ............
See problems(...) for more details.

Quitting from lines 33-60 (visualization_examples.Rmd) 
Error: processing vignette 'visualization_examples.Rmd' failed with diagnostics:
assert_that: assertion must return a logical value
--- failed re-building ‘visualization_examples.Rmd’

SUMMARY: processing the following files failed:
  ‘povcalnetR.Rmd’ ‘visualization_examples.Rmd’

Error: Vignette re-building failed.
Execution halted