Error(s) in re-building vignettes:
  ...
--- re-building ‘popdemog_tutorial.Rmd’ using rmarkdown
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Quitting from lines 336-357 (popdemog_tutorial.Rmd) 
Error: processing vignette 'popdemog_tutorial.Rmd' failed with diagnostics:
‘legacy_worldMapEnv’ is not an exported object from ‘namespace:maps’
--- failed re-building ‘popdemog_tutorial.Rmd’

SUMMARY: processing the following file failed:
  ‘popdemog_tutorial.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building ‘popdemog_tutorial.Rmd’ using rmarkdown
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Quitting from lines 336-357 (popdemog_tutorial.Rmd) 
Error: processing vignette 'popdemog_tutorial.Rmd' failed with diagnostics:
'legacy_worldMapEnv' is not an exported object from 'namespace:maps'
--- failed re-building ‘popdemog_tutorial.Rmd’

SUMMARY: processing the following file failed:
  ‘popdemog_tutorial.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building ‘popdemog_tutorial.Rmd’ using rmarkdown
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Read 120 items
There are  18 time events for  4  populations
read N and g, done!
read m, done!
read pos and update, done!
demographic initiation, done!
plot initiation, done!
Quitting from lines 336-357 (popdemog_tutorial.Rmd) 
Error: processing vignette 'popdemog_tutorial.Rmd' failed with diagnostics:
'legacy_worldMapEnv' is not an exported object from 'namespace:maps'
--- failed re-building ‘popdemog_tutorial.Rmd’

SUMMARY: processing the following file failed:
  ‘popdemog_tutorial.Rmd’

Error: Vignette re-building failed.
Execution halted