Running examples in ‘gasper-Ex.R’ failed
The error most likely occurred in:

> ### Name: HPFVN
> ### Title: High Pass Filter Von Neumann Estimator.
> ### Aliases: HPFVN
> 
> ### ** Examples
> 
> matrixname <- "grid1"
> groupname <- "AG-Monien"
> graph <- download_graph(matrixname,groupname)
trying URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Warning in download.file(url, temp) :
  URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz': status was 'SSL peer certificate or SSH remote key was not OK'
Error in download.file(url, temp) : 
  cannot open URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Calls: download_graph -> download.file
Execution halted
Error(s) in re-building vignettes:
--- re-building ‘gasper_vignette.rmd’ using rmarkdown
trying URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Quitting from lines 52-56 (gasper_vignette.rmd) 
Error: processing vignette 'gasper_vignette.rmd' failed with diagnostics:
cannot open URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
--- failed re-building ‘gasper_vignette.rmd’

SUMMARY: processing the following file failed:
  ‘gasper_vignette.rmd’

Error: Vignette re-building failed.
Execution halted
Running examples in 'gasper-Ex.R' failed
The error most likely occurred in:

> ### Name: HPFVN
> ### Title: High Pass Filter Von Neumann Estimator.
> ### Aliases: HPFVN
> 
> ### ** Examples
> 
> matrixname <- "grid1"
> groupname <- "AG-Monien"
> graph <- download_graph(matrixname,groupname)
trying URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Warning in download.file(url, temp) :
  InternetOpenUrl failed: 'Die Serververbindung konnte nicht hergestellt werden.'
Error in download.file(url, temp) : 
  cannot open URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Calls: download_graph -> download.file
Execution halted
Running examples in 'gasper-Ex.R' failed
The error most likely occurred in:

> ### Name: HPFVN
> ### Title: High Pass Filter Von Neumann Estimator.
> ### Aliases: HPFVN
> 
> ### ** Examples
> 
> matrixname <- "grid1"
> groupname <- "AG-Monien"
> graph <- download_graph(matrixname,groupname)
trying URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Warning in download.file(url, temp) :
  InternetOpenUrl failed: 'Die Serververbindung konnte nicht hergestellt werden.'
Error in download.file(url, temp) : 
  cannot open URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Calls: download_graph -> download.file
Execution halted
Error(s) in re-building vignettes:
--- re-building 'gasper_vignette.rmd' using rmarkdown
trying URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
Quitting from lines 52-56 (gasper_vignette.rmd) 
Error: processing vignette 'gasper_vignette.rmd' failed with diagnostics:
cannot open URL 'https://sparse.tamu.edu/MM/AG-Monien/grid1.tar.gz'
--- failed re-building 'gasper_vignette.rmd'

SUMMARY: processing the following file failed:
  'gasper_vignette.rmd'

Error: Vignette re-building failed.
Execution halted