Error(s) in re-building vignettes:
--- re-building ‘ndtv.Rnw’ using Sweave
Loading required package: network

‘network’ 1.17.1 (2021-06-12), part of the Statnet Project
* ‘news(package="network")’ for changes since last version
* ‘citation("network")’ for citation information
* ‘https://statnet.org’ for help, support, and other information

Loading required package: networkDynamic

‘networkDynamic’ 0.11.0 (2021-06-12), part of the Statnet Project
* ‘news(package="networkDynamic")’ for changes since last version
* ‘citation("networkDynamic")’ for citation information
* ‘https://statnet.org’ for help, support, and other information

Loading required package: animation
Loading required package: sna
Loading required package: statnet.common

Attaching package: ‘statnet.common’

The following objects are masked from ‘package:base’:

    attr, order

sna: Tools for Social Network Analysis
Version 2.6 created on 2020-10-5.
copyright (c) 2005, Carter T. Butts, University of California-Irvine
 For citation information, type citation("sna").
 Type help(package="sna") to get started.


‘ndtv’ 0.13.0 (2019-05-21), part of the Statnet Project
* ‘news(package="ndtv")’ for changes since last version
* ‘citation("ndtv")’ for citation information
* ‘https://statnet.org’ for help, support, and other information

No slice.par found, using
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Loading required package: tergm
Loading required package: ergm

‘ergm’ 4.0.1 (2021-06-20), part of the Statnet Project
* ‘news(package="ergm")’ for changes since last version
* ‘citation("ergm")’ for citation information
* ‘https://statnet.org’ for help, support, and other information

‘ergm’ 4 is a major update that introduces some
backwards-incompatible changes. Please type
‘news(package="ergm")’ for a list of major changes.


Attaching package: ‘ergm’

The following object is masked from ‘package:statnet.common’:

    snctrl


‘tergm’ 4.0.1 (2021-06-24), part of the Statnet Project
* ‘news(package="tergm")’ for changes since last version
* ‘citation("tergm")’ for citation information
* ‘https://statnet.org’ for help, support, and other information


Attaching package: ‘tergm’

The following object is masked from ‘package:ergm’:

    snctrl

The following object is masked from ‘package:statnet.common’:

    snctrl

Starting maximum pseudolikelihood estimation (MPLE):
Evaluating the predictor and response matrix.
Maximizing the pseudolikelihood.
Finished MPLE.
Starting Monte Carlo maximum likelihood estimation (MCMLE):
Iteration 1 of at most 60:
Optimizing with step length 0.9045.
The log-likelihood improved by 3.4874.
Estimating equations are not within tolerance region.
Iteration 2 of at most 60:
Optimizing with step length 1.0000.
The log-likelihood improved by 0.0806.
Convergence test p-value: 0.0059. Converged with 99% confidence.
Finished MCMLE.
This model was fit using MCMC.  To examine model
diagnostics and check for degeneracy, use the
mcmc.diagnostics() function.
========  Phase 1: Burn in, get initial gradient values, and find a configuration under which all targets vary. ========
Burning in... Done.
Attempt 1 :
None of the parameters have a detectable effect. Increasing jitter.
Attempt 2 :
All parameters have some effect and all statistics are moving. Proceeding to Phase 2.
========  Phase 2: Find and refine the estimate. ========
Subphase 2.1 ///////////\\\\\
Subphase 2.2 \\\\\
Subphase 2.3 \\\\\
Subphase 2.4 \\\/\\\\\
========  Phase 3: Simulate from the fit and estimate standard errors. ========
Subphase 2.5 \/\\/\\\\\
========  Phase 3: Simulate from the fit and estimate standard errors. ========
Subphase 2.6 ///////////////////////////////\//////////////////////\\\\\
========  Phase 3: Simulate from the fit and estimate standard errors. ========
Subphase 2.7 /////////\//\\\\\
========  Phase 3: Simulate from the fit and estimate standard errors. ========
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sh: ffmpeg: command not found
Error in system(paste(ffmpeg, "-version"), intern = TRUE) : 
  error in running command
Warning in saveVideo(ani.replay(), video.name = "stergm.sim.1.mp4", other.opts = "-b 5000k",  :
  The command "'ffmpeg'" is not available in your system. Please install FFmpeg or avconv first: http://ffmpeg.org/download.html
caching 5 properties for slice 0
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wrote animation HTML file to stergm.sim1.html
opening local URL file:///data/gannet/ripley/R/packages/tests-clang/ndtv.Rcheck/vign_test/ndtv/vignettes/stergm.sim1.html in web browser
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Loading required namespace: htmlwidgets
loading ndtv-d3 animation widget...
Loading required namespace: scatterplot3d
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assuming dynamic colors
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computing vertex positions using 1D sammon layout ...
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rendering splines for each vertex ...
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rendering splines for each vertex ...
Error: processing vignette 'ndtv.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'ndtv.tex' failed.
LaTeX errors:
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                                                  {76}(1), 29-46.
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! Undefined control sequence.
l.748 doi:\nobreakspace{}\Rhref
                               {https://doi.org/10.1111/rssb.12014}{10.1111\...
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! Undefined control sequence.
l.752 ...tational and Graphical Statistics}, \bold
                                                  {24}(2), 502-519.
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! Undefined control sequence.
l.753 doi:\nobreakspace{}\Rhref
                               {https://doi.org/10.1080/10618600.2014.903087...
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of your error message was never \def'ed. If you have
--- failed re-building ‘ndtv.Rnw’

SUMMARY: processing the following file failed:
  ‘ndtv.Rnw’

Error: Vignette re-building failed.
Execution halted