Error(s) in re-building vignettes:
  ...
--- re-building 'i-introduction.Rmd' using rmarkdown
--- finished re-building 'i-introduction.Rmd'

--- re-building 'ii-modules.Rmd' using rmarkdown

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: quickPlot
Loading required package: reproducible

Attaching package: 'SpaDES.core'

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

    end, start

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

    citation

Loading required package: SpaDES.tools
Loading required package: RandomFields
Loading required package: sp
Loading required package: RandomFieldsUtils

Attaching package: 'RandomFields'

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

    RFoptions

Setting:
  options(
    spades.modulePath = '/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/SpaDES.core/sampleModules'
  )
Paths set to:
  options(
    reproducible.cachePath = '/tmp/RtmpXI1Cx3/reproducible/cache'
    spades.inputPath = '/tmp/RtmpukcpUP/SpaDES/inputs'
    spades.outputPath = '/tmp/RtmpukcpUP/SpaDES/outputs'
    spades.modulePath = '/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/SpaDES.core/sampleModules'
  )
simList saved in
 SpaDES.core:::.pkgEnv$.sim 
It will be deleted at next spades call
Setting:
  options(
    spades.modulePath = '/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/SpaDES.core/sampleModules'
  )
Paths set to:
  options(
    reproducible.cachePath = '/tmp/RtmpXI1Cx3/reproducible/cache'
    spades.inputPath = '/tmp/RtmpukcpUP/SpaDES/inputs'
    spades.outputPath = '/tmp/RtmpukcpUP/SpaDES/outputs'
    spades.modulePath = '/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/SpaDES.core/sampleModules'
  )
Quitting from lines 474-495 (ii-modules.Rmd) 
Error: processing vignette 'ii-modules.Rmd' failed with diagnostics:
object 'from' not found
--- failed re-building 'ii-modules.Rmd'

--- re-building 'iii-cache.Rmd' using rmarkdown
Loading required package: sp

Attaching package: 'raster'

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

    extract

Loading required package: quickPlot
Loading required package: reproducible

Attaching package: 'SpaDES.core'

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

    end, start

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

    citation

Setting:
  options(
    spades.modulePath = '/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/SpaDES.core/sampleModules'
  )
Paths set to:
  options(
    reproducible.cachePath = '/tmp/RtmpdpaLCB/reproducible/cache'
    spades.inputPath = '/tmp/RtmpukcpUP/SpaDES/inputs'
    spades.outputPath = '/tmp/RtmpukcpUP/SpaDES/outputs'
    spades.modulePath = '/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/SpaDES.core/sampleModules'
  )
--- finished re-building 'iii-cache.Rmd'

SUMMARY: processing the following file failed:
  'ii-modules.Rmd'

Error: Vignette re-building failed.
Execution halted