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+Spreadsheet20.02.191/$file/634501.xls’
Content type 'application/vnd.ms-excel' length 95232 bytes (93 KB)
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downloaded 93 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.192/$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+Spreadsheet20.02.193/$file/634502b.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+Spreadsheet20.02.194/$file/634503a.xls’
Content type 'application/vnd.ms-excel' length 68608 bytes (67 KB)
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downloaded 67 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.195/$file/634503b.xls’
Content type 'application/vnd.ms-excel' length 108032 bytes (105 KB)
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downloaded 105 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.196/$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+Spreadsheet20.02.197/$file/634504b.xls’
Content type 'application/vnd.ms-excel' length 109568 bytes (107 KB)
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downloaded 107 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.198/$file/634505a.xls’
Content type 'application/vnd.ms-excel' length 197120 bytes (192 KB)
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downloaded 192 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.199/$file/634505b.xls’
Content type 'application/vnd.ms-excel' length 386048 bytes (377 KB)
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downloaded 377 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.1910/$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+Spreadsheet20.02.1911/$file/634507b.xls’
Content type 'application/vnd.ms-excel' length 86016 bytes (84 KB)
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downloaded 84 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.1912/$file/634508a.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+Spreadsheet20.02.1913/$file/634508b.xls’
Content type 'application/vnd.ms-excel' length 109568 bytes (107 KB)
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downloaded 107 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.1914/$file/634509a.xls’
Content type 'application/vnd.ms-excel' length 198144 bytes (193 KB)
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downloaded 193 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.1915/$file/634509b.xls’
Content type 'application/vnd.ms-excel' length 387584 bytes (378 KB)
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downloaded 378 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.1916/$file/63450table2bto9b.xls’
Content type 'application/vnd.ms-excel' length 309760 bytes (302 KB)
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downloaded 302 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6345.0Time+Series+Spreadsheet20.02.1917/$file/63450table2ato9a.xls’
Content type 'application/vnd.ms-excel' length 254976 bytes (249 KB)
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downloaded 249 KB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6202.0Time+Series+Spreadsheet21.03.1910/$file/6202001.xls’
Content type 'application/vnd.ms-excel' length 1146368 bytes (1.1 MB)
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downloaded 1.1 MB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6202.0Time+Series+Spreadsheet21.03.1910/$file/6202001.xls’
Content type 'application/vnd.ms-excel' length 1146368 bytes (1.1 MB)
==================================================
downloaded 1.1 MB

trying URL ‘https://www.abs.gov.au/AUSSTATS/meisubs.nsf/lookupAttach/6202.0Time+Series+Spreadsheet21.03.1950/$file/6202005.xls’
Content type 'application/vnd.ms-excel' length 883712 bytes (863 KB)
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downloaded 863 KB

Quitting from lines 174-189 (readabs_vignette.Rmd) 
Error: processing vignette 'readabs_vignette.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘readabs_vignette.Rmd’

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

Error: Vignette re-building failed.
Execution halted