Error(s) in re-building vignettes:
  ...
--- re-building 'create_config.Rmd' using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'create_config.Rmd'

--- re-building 'create_input_landscape.Rmd' using rmarkdown
Loading required package: sp
--- finished re-building 'create_input_landscape.Rmd'

--- re-building 'design_landscape.Rmd' using rmarkdown
--- finished re-building 'design_landscape.Rmd'

--- re-building 'introduction.Rmd' using rmarkdown

(process:31057): Pango-WARNING **: 21:25:27.742: Invalid UTF-8 string passed to pango_layout_set_text()

(process:31057): Pango-WARNING **: 21:25:27.767: Invalid UTF-8 string passed to pango_layout_set_text()

(process:31057): Pango-WARNING **: 21:25:28.671: Invalid UTF-8 string passed to pango_layout_set_text()

(process:31057): Pango-WARNING **: 21:25:28.672: Invalid UTF-8 string passed to pango_layout_set_text()
--- finished re-building 'introduction.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘create_config.Rmd’ using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette ‘create_config.Rmd’ failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘create_config.Rmd’

--- re-building ‘create_input_landscape.Rmd’ using rmarkdown
Loading required package: sp
--- finished re-building ‘create_input_landscape.Rmd’

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

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

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

Error: Vignette re-building failed.
Execution halted
installed size is  6.6Mb
  sub-directories of 1Mb or more:
    doc       1.3Mb
    extdata   3.5Mb
    libs      1.4Mb
Namespace in Imports field not imported from: ‘sp’
  All declared Imports should be used.
Error(s) in re-building vignettes:
--- re-building ‘create_config.Rmd’ using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘create_config.Rmd’

--- re-building ‘create_input_landscape.Rmd’ using rmarkdown
Loading required package: sp
--- finished re-building ‘create_input_landscape.Rmd’

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

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

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

Error: Vignette re-building failed.
Execution halted
Namespace in Imports field not imported from: ‘sp’
  All declared Imports should be used.
Error(s) in re-building vignettes:
--- re-building ‘create_config.Rmd’ using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘create_config.Rmd’

--- re-building ‘create_input_landscape.Rmd’ using rmarkdown
Loading required package: sp
--- finished re-building ‘create_input_landscape.Rmd’

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

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

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

Error: Vignette re-building failed.
Execution halted
installed size is  5.9Mb
  sub-directories of 1Mb or more:
    doc       1.3Mb
    extdata   3.2Mb
    libs      1.0Mb
Error(s) in re-building vignettes:
--- re-building 'create_config.Rmd' using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'create_config.Rmd'

--- re-building 'create_input_landscape.Rmd' using rmarkdown
Loading required package: sp
--- finished re-building 'create_input_landscape.Rmd'

--- re-building 'design_landscape.Rmd' using rmarkdown
--- finished re-building 'design_landscape.Rmd'

--- re-building 'introduction.Rmd' using rmarkdown
--- finished re-building 'introduction.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Namespace in Imports field not imported from: 'sp'
  All declared Imports should be used.
Error(s) in re-building vignettes:
--- re-building 'create_config.Rmd' using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'create_config.Rmd'

--- re-building 'create_input_landscape.Rmd' using rmarkdown
Loading required package: sp
--- finished re-building 'create_input_landscape.Rmd'

--- re-building 'design_landscape.Rmd' using rmarkdown
--- finished re-building 'design_landscape.Rmd'

--- re-building 'introduction.Rmd' using rmarkdown
--- finished re-building 'introduction.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘create_config.Rmd’ using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘create_config.Rmd’

--- re-building ‘create_input_landscape.Rmd’ using rmarkdown
Loading required package: sp
--- finished re-building ‘create_input_landscape.Rmd’

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

--- re-building ‘introduction.Rmd’ using rmarkdown
Loading required package: sp
--- finished re-building ‘introduction.Rmd’

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

Error: Vignette re-building failed.
Execution halted
installed size is  5.6Mb
  sub-directories of 1Mb or more:
    doc       1.4Mb
    extdata   3.4Mb
Namespace in Imports field not imported from: ‘sp’
  All declared Imports should be used.
Error(s) in re-building vignettes:
  ...
--- re-building ‘create_config.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘create_config.Rmd’

--- re-building ‘create_input_landscape.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Loading required package: sp
--- finished re-building ‘create_input_landscape.Rmd’

--- re-building ‘design_landscape.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- finished re-building ‘design_landscape.Rmd’

--- re-building ‘introduction.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Loading required package: sp
--- finished re-building ‘introduction.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘create_config.Rmd’ using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘create_config.Rmd’

--- re-building ‘create_input_landscape.Rmd’ using rmarkdown
Loading required package: sp
--- finished re-building ‘create_input_landscape.Rmd’

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

--- re-building ‘introduction.Rmd’ using rmarkdown
Loading required package: sp
--- finished re-building ‘introduction.Rmd’

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

Error: Vignette re-building failed.
Execution halted
installed size is  6.8Mb
  sub-directories of 1Mb or more:
    doc       1.3Mb
    extdata   3.4Mb
    libs      1.7Mb
Namespace in Imports field not imported from: ‘sp’
  All declared Imports should be used.
installed size is  6.6Mb
  sub-directories of 1Mb or more:
    doc       1.3Mb
    extdata   3.4Mb
    libs      1.5Mb
Namespace in Imports field not imported from: ‘sp’
  All declared Imports should be used.
installed size is  7.1Mb
  sub-directories of 1Mb or more:
    doc       1.3Mb
    extdata   3.2Mb
    libs      2.1Mb
Error(s) in re-building vignettes:
--- re-building 'create_config.Rmd' using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'create_config.Rmd'

--- re-building 'create_input_landscape.Rmd' using rmarkdown
Loading required package: sp
--- finished re-building 'create_input_landscape.Rmd'

--- re-building 'design_landscape.Rmd' using rmarkdown
--- finished re-building 'design_landscape.Rmd'

--- re-building 'introduction.Rmd' using rmarkdown
Loading required package: sp
--- finished re-building 'introduction.Rmd'

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

Error: Vignette re-building failed.
Execution halted
installed size is  6.6Mb
  sub-directories of 1Mb or more:
    doc       1.3Mb
    extdata   3.4Mb
    libs      1.5Mb
Namespace in Imports field not imported from: ‘sp’
  All declared Imports should be used.
installed size is  7.1Mb
  sub-directories of 1Mb or more:
    doc       1.3Mb
    extdata   3.2Mb
    libs      2.1Mb
Error(s) in re-building vignettes:
--- re-building 'create_config.Rmd' using rmarkdown
Quitting from lines 250-256 (create_config.Rmd) 
Error: processing vignette 'create_config.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'create_config.Rmd'

--- re-building 'create_input_landscape.Rmd' using rmarkdown
Loading required package: sp
--- finished re-building 'create_input_landscape.Rmd'

--- re-building 'design_landscape.Rmd' using rmarkdown
--- finished re-building 'design_landscape.Rmd'

--- re-building 'introduction.Rmd' using rmarkdown
Loading required package: sp
--- finished re-building 'introduction.Rmd'

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

Error: Vignette re-building failed.
Execution halted