## Test environments

* ubuntu 20.04-release
* ubuntu 20.04-devel
* windows-latest
* macOS-latest


## R CMD check results

R CMD check results
0 errors | 0 warnings | 0 notes


## Reverse dependencies

There are no reverse dependencies


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I have read and agree to the the CRAN
policies at https://cran.r-project.org/web/packages/policies.html

This is an update to handle cases where web resource is unavailable, such that the function fails gracefully. Thanks to Prof Brian Ripley for reminding me of CRAN policy. 

Thanks!
Tad Dallas
