Error(s) in re-building vignettes:
  ...
--- re-building ‘bugfixes.Rnw’ using Sweave
Loading required package: spatstat.data
Loading required package: spatstat.geom
spatstat.geom 3.0-3
Loading required package: spatstat.random
spatstat.random 3.0-1
Loading required package: spatstat.core
Loading required package: nlme
Loading required package: rpart
spatstat.core 2.4-4
Loading required package: spatstat.linnet
spatstat.linnet 2.3-2

spatstat 2.3-4       (nickname: ‘Watch this space’) 
For an introduction to spatstat, type ‘beginner’ 

--- finished re-building 'bugfixes.Rnw'

--- re-building ‘datasets.Rnw’ using Sweave
Loading required package: spatstat.data
Loading required package: spatstat.geom
spatstat.geom 3.0-3
Loading required package: spatstat.random
spatstat.random 3.0-1
Loading required package: spatstat.core
Loading required package: nlme
Loading required package: rpart
spatstat.core 2.4-4
Loading required package: spatstat.linnet
spatstat.linnet 2.3-2

spatstat 2.3-4       (nickname: ‘Watch this space’) 
For an introduction to spatstat, type ‘beginner’ 

--- finished re-building 'datasets.Rnw'

--- re-building ‘getstart.Rnw’ using Sweave
Loading required package: spatstat.data
Loading required package: spatstat.geom
spatstat.geom 3.0-3
Loading required package: spatstat.random
spatstat.random 3.0-1
Loading required package: spatstat.core
Loading required package: nlme
Loading required package: rpart
spatstat.core 2.4-4
Loading required package: spatstat.linnet
spatstat.linnet 2.3-2

spatstat 2.3-4       (nickname: ‘Watch this space’) 
For an introduction to spatstat, type ‘beginner’ 

--- finished re-building 'getstart.Rnw'

--- re-building ‘replicated.Rnw’ using Sweave
Loading required package: spatstat.data
Loading required package: spatstat.geom
spatstat.geom 3.0-3
Loading required package: spatstat.random
spatstat.random 3.0-1
Loading required package: spatstat.core
Loading required package: nlme
Loading required package: rpart
spatstat.core 2.4-4
Loading required package: spatstat.linnet
spatstat.linnet 2.3-2

spatstat 2.3-4       (nickname: ‘Watch this space’) 
For an introduction to spatstat, type ‘beginner’ 

Loading required namespace: spatstat.explore
Failed with error:  'there is no package called 'spatstat.explore''

Error: processing vignette ‘replicated.Rnw’ failed with diagnostics:
 chunk 31 
Error : Package 'spatstat.explore' is required for plotting objects of class 'fv'

--- failed re-building 'replicated.Rnw'

--- re-building ‘shapefiles.Rnw’ using Sweave
Loading required package: spatstat.data
Loading required package: spatstat.geom
spatstat.geom 3.0-3
Loading required package: spatstat.random
spatstat.random 3.0-1
Loading required package: spatstat.core
Loading required package: nlme
Loading required package: rpart
spatstat.core 2.4-4
Loading required package: spatstat.linnet
spatstat.linnet 2.3-2

spatstat 2.3-4       (nickname: ‘Watch this space’) 
For an introduction to spatstat, type ‘beginner’ 

--- finished re-building 'shapefiles.Rnw'

--- re-building ‘updates.Rnw’ using Sweave
Loading required package: spatstat.data
Loading required package: spatstat.geom
spatstat.geom 3.0-3
Loading required package: spatstat.random
spatstat.random 3.0-1
Loading required package: spatstat.core
Loading required package: nlme
Loading required package: rpart
spatstat.core 2.4-4
Loading required package: spatstat.linnet
spatstat.linnet 2.3-2

spatstat 2.3-4       (nickname: ‘Watch this space’) 
For an introduction to spatstat, type ‘beginner’ 

--- finished re-building 'updates.Rnw'

SUMMARY: processing the following file failed:
  ‘replicated.Rnw’

Error: Vignette re-building failed.
Execution halted