Error(s) in re-building vignettes:
  ...
duplicated vignette title:
  ‘mlbgameday: Database Connections’

--- re-building ‘data_automation.Rmd’ using rmarkdown
--- finished re-building ‘data_automation.Rmd’

--- re-building ‘data_storage.Rmd’ using rmarkdown
Warning in "factor" %in% attrib[["class", exact = TRUE]] :
  closing unused connection 5 (http://gd2.mlb.com/components/game/mlb/year_2018/month_03/day_20/gid_2018_03_20_tbamlb_balmlb_1/inning/inning_all.xml)
Warning in get0(oNam, envir = ns) :
  closing unused connection 5 (http://gd2.mlb.com/components/game/mlb/year_2018/month_03/day_24/gid_2018_03_24_sfnmlb_srcaaa_1/inning/inning_all.xml)
Warning in for (i in seq_len(n)) { :
  closing unused connection 6 (http://gd2.mlb.com/components/game/mlb/year_2018/month_03/day_26/gid_2018_03_26_chamlb_chraaa_1/inning/inning_all.xml)
Warning in for (i in seq_len(n)) { :
  closing unused connection 5 (http://gd2.mlb.com/components/game/mlb/year_2018/month_03/day_26/gid_2018_03_26_balmlb_noraaa_1/inning/inning_all.xml)
Warning in for (i in seq_len(n)) { :
  closing unused connection 5 (http://gd2.mlb.com/components/game/mlb/year_2018/month_03/day_26/gid_2018_03_26_kcamlb_omaaaa_1/inning/inning_all.xml)
Warning in for (i in seq_len(n)) { :
  closing unused connection 5 (http://gd2.mlb.com/components/game/mlb/year_2018/month_03/day_26/gid_2018_03_26_sdnmlb_elpaaa_1/inning/inning_all.xml)
Warning in for (i in seq_along(cl)) { :
  closing unused connection 5 (http://gd2.mlb.com/components/game/mlb/year_2018/month_03/day_27/gid_2018_03_27_cinmlb_texmlb_1/inning/inning_all.xml)
--- finished re-building ‘data_storage.Rmd’

--- re-building ‘database_connections.Rmd’ using rmarkdown
--- finished re-building ‘database_connections.Rmd’

--- re-building ‘parallel_processing.Rmd’ using rmarkdown
--- finished re-building ‘parallel_processing.Rmd’

--- re-building ‘pitch_plotting.Rmd’ using rmarkdown
--- finished re-building ‘pitch_plotting.Rmd’

--- re-building ‘search_games.Rmd’ using rmarkdown
--- finished re-building ‘search_games.Rmd’

Error: Duplicate vignette titles.
  Ensure that the %\VignetteIndexEntry lines in the vignette sources
  correspond to the vignette titles.
Execution halted