Error(s) in re-building vignettes:
  ...
--- re-building 'tutorial.Rnw' using Sweave
Error: processing vignette 'tutorial.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'tutorial.tex' failed.
LaTeX errors:
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
--- failed re-building 'tutorial.Rnw'

SUMMARY: processing the following file failed:
  'tutorial.Rnw'

Error: Vignette re-building failed.
Execution halted