Error(s) in re-building vignettes:
  ...
--- re-building ‘spq_userguide.Rmd’ using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building ‘spq_userguide.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘spq_userguide.Rmd’ using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building ‘spq_userguide.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Namespace in Imports field not imported from: ‘lwgeom’
  All declared Imports should be used.
Note: found 4 marked UTF-8 strings
Error(s) in re-building vignettes:
--- re-building ‘spq_userguide.Rmd’ using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building ‘spq_userguide.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Namespace in Imports field not imported from: ‘lwgeom’
  All declared Imports should be used.
Note: found 4 marked UTF-8 strings
Error(s) in re-building vignettes:
--- re-building ‘spq_userguide.Rmd’ using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building ‘spq_userguide.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'spq_userguide.Rmd' using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building 'spq_userguide.Rmd'

SUMMARY: processing the following file failed:
  'spq_userguide.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘spq_userguide.Rmd’ using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building ‘spq_userguide.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘spq_userguide.Rmd’ using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building ‘spq_userguide.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'spq_userguide.Rmd' using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building 'spq_userguide.Rmd'

SUMMARY: processing the following file failed:
  'spq_userguide.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'spq_userguide.Rmd' using rmarkdown

Quitting from lines 500-501 [unnamed-chunk-24] (spq_userguide.Rmd)
Error: processing vignette 'spq_userguide.Rmd' failed with diagnostics:
Invalid index: field name 'x_start' not found
--- failed re-building 'spq_userguide.Rmd'

SUMMARY: processing the following file failed:
  'spq_userguide.Rmd'

Error: Vignette re-building failed.
Execution halted