Error(s) in re-building vignettes:
  ...
--- re-building ‘readabs_vignette.Rmd’ using rmarkdown
trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.201/$file/634501.xls’
Content type 'application/vnd.ms-excel' length 96768 bytes (94 KB)
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downloaded 94 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.202/$file/634502a.xls’
Content type 'application/vnd.ms-excel' length 69120 bytes (67 KB)
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downloaded 67 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.203/$file/634502b.xls’
Content type 'application/vnd.ms-excel' length 110080 bytes (107 KB)
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downloaded 107 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.204/$file/634503a.xls’
Content type 'application/vnd.ms-excel' length 69120 bytes (67 KB)
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downloaded 67 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.205/$file/634503b.xls’
Content type 'application/vnd.ms-excel' length 109056 bytes (106 KB)
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downloaded 106 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.206/$file/634504a.xls’
Content type 'application/vnd.ms-excel' length 69120 bytes (67 KB)
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downloaded 67 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.207/$file/634504b.xls’
Content type 'application/vnd.ms-excel' length 110592 bytes (108 KB)
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downloaded 108 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.208/$file/634505a.xls’
Content type 'application/vnd.ms-excel' length 198656 bytes (194 KB)
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downloaded 194 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.209/$file/634505b.xls’
Content type 'application/vnd.ms-excel' length 391680 bytes (382 KB)
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downloaded 382 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2010/$file/634507a.xls’
Content type 'application/vnd.ms-excel' length 58368 bytes (57 KB)
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downloaded 57 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2011/$file/634507b.xls’
Content type 'application/vnd.ms-excel' length 86528 bytes (84 KB)
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downloaded 84 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2012/$file/634508a.xls’
Content type 'application/vnd.ms-excel' length 69632 bytes (68 KB)
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downloaded 68 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2013/$file/634508b.xls’
Content type 'application/vnd.ms-excel' length 110592 bytes (108 KB)
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downloaded 108 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2014/$file/634509a.xls’
Content type 'application/vnd.ms-excel' length 198656 bytes (194 KB)
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downloaded 194 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2015/$file/634509b.xls’
Content type 'application/vnd.ms-excel' length 392704 bytes (383 KB)
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downloaded 383 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2016/$file/63450table2bto9b.xls’
Content type 'application/vnd.ms-excel' length 315904 bytes (308 KB)
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downloaded 308 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet19.02.2017/$file/63450table2ato9a.xls’
Content type 'application/vnd.ms-excel' length 256512 bytes (250 KB)
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downloaded 250 KB

Quitting from lines 64-67 (readabs_vignette.Rmd) 
Error: processing vignette 'readabs_vignette.Rmd' failed with diagnostics:
'where' must be an environment
--- failed re-building ‘readabs_vignette.Rmd’

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

Error: Vignette re-building failed.
Execution halted