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

Attaching package: 'Ryacas'

The following object is masked from 'package:stats':

    integrate

The following objects are masked from 'package:base':

    %*%, diag, diag<-, lower.tri, upper.tri

--- finished re-building ‘arbitrary-precision.Rmd’

--- re-building ‘getting-started.Rmd’ using rmarkdown

Attaching package: 'Ryacas'

The following object is masked from 'package:stats':

    integrate

The following objects are masked from 'package:base':

    %*%, diag, diag<-, lower.tri, upper.tri

--- finished re-building ‘getting-started.Rmd’

--- re-building ‘high-level.Rmd’ using rmarkdown

Attaching package: 'Ryacas'

The following object is masked from 'package:stats':

    integrate

The following objects are masked from 'package:base':

    %*%, diag, diag<-, lower.tri, upper.tri

--- finished re-building ‘high-level.Rmd’

--- re-building ‘latent-variable-model.Rmd’ using rmarkdown

Attaching package: 'Ryacas'

The following object is masked from 'package:stats':

    integrate

The following objects are masked from 'package:base':

    %*%, diag, diag<-, lower.tri, upper.tri

--- finished re-building ‘latent-variable-model.Rmd’

--- re-building ‘low-level.Rmd’ using rmarkdown

Attaching package: 'Ryacas'

The following object is masked from 'package:stats':

    integrate

The following objects are masked from 'package:base':

    %*%, diag, diag<-, lower.tri, upper.tri

--- finished re-building ‘low-level.Rmd’

--- re-building ‘ssm-matrix.Rmd’ using rmarkdown

Attaching package: 'Ryacas'

The following object is masked from 'package:stats':

    integrate

The following objects are masked from 'package:base':

    %*%, diag, diag<-, lower.tri, upper.tri

Quitting from lines 67-69 (ssm-matrix.Rmd) 
Error: processing vignette 'ssm-matrix.Rmd' failed with diagnostics:
timeout reached (2.000000 sec)
--- failed re-building ‘ssm-matrix.Rmd’

--- re-building ‘yacas-rules.Rmd’ using rmarkdown

Attaching package: 'Ryacas'

The following object is masked from 'package:stats':

    integrate

The following objects are masked from 'package:base':

    %*%, diag, diag<-, lower.tri, upper.tri

--- finished re-building ‘yacas-rules.Rmd’

SUMMARY: processing the following file failed:
  ‘ssm-matrix.Rmd’

Error: Vignette re-building failed.
Execution halted