Error(s) in re-building vignettes:
--- re-building ‘simmer-01-introduction.Rmd’ using rmarkdown
--- finished re-building ‘simmer-01-introduction.Rmd’

--- re-building ‘simmer-02-jss.Rmd’ using rmarkdown
Warning: LaTeX Warning: Label `architecture' multiply defined.
Warning: LaTeX Warning: There were multiply-defined labels.
--- finished re-building ‘simmer-02-jss.Rmd’

--- re-building ‘simmer-03-trajectories.Rmd’ using rmarkdown
--- finished re-building ‘simmer-03-trajectories.Rmd’

--- re-building ‘simmer-04-bank-1.Rmd’ using rmarkdown
--- finished re-building ‘simmer-04-bank-1.Rmd’

--- re-building ‘simmer-04-bank-2.Rmd’ using rmarkdown
Quitting from lines 571-598 (simmer-04-bank-2.Rmd) 
Error: processing vignette 'simmer-04-bank-2.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘simmer-04-bank-2.Rmd’

--- re-building ‘simmer-05-simpy.Rmd’ using rmarkdown
--- finished re-building ‘simmer-05-simpy.Rmd’

--- re-building ‘simmer-06-queueing.Rmd’ using rmarkdown
Quitting from lines 70-78 (simmer-06-queueing.Rmd) 
Error: processing vignette 'simmer-06-queueing.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘simmer-06-queueing.Rmd’

--- re-building ‘simmer-07-ctmc.Rmd’ using rmarkdown
Quitting from lines 156-161 (simmer-07-ctmc.Rmd) 
Error: processing vignette 'simmer-07-ctmc.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘simmer-07-ctmc.Rmd’

--- re-building ‘simmer-08-philosophers.Rmd’ using rmarkdown
Quitting from lines 104-114 (simmer-08-philosophers.Rmd) 
Error: processing vignette 'simmer-08-philosophers.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘simmer-08-philosophers.Rmd’

--- re-building ‘simmer-aa-5G.Rmd’ using rmarkdown
--- finished re-building ‘simmer-aa-5G.Rmd’

SUMMARY: processing the following files failed:
  ‘simmer-04-bank-2.Rmd’ ‘simmer-06-queueing.Rmd’ ‘simmer-07-ctmc.Rmd’
  ‘simmer-08-philosophers.Rmd’

Error: Vignette re-building failed.
Execution halted