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I was running the "R Programming Basic Building Blocks", in the Swirl package. Everything was going well, until this point:

""Anytime you have questions about a particular function, you can access R's | built-in help files via the ? command. For example, if you want more | information on the c() function, type ?c without the parentheses that | normally follow a function name. Give it a try.""

I´d tried many and many times. just appeared the following message:

"" ?c Error in shell.exec(url) : access to 'http://127.0.0.1:31006/library/base/html/c.html' denied""

Even when I pressed "skip () ", it showed the correct answer and the same message:

""?c Error in shell.exec(url) : access to 'http://127.0.0.1:31006/library/base/html/c.html' denied""

| Leaving swirl now. Type swirl() to resume.

Anyone here know how to solve this problem?

TIA

Livia Rivka Rego
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  • I have tried, using `?c`, and was not able to reproduce this error with a new installation of `swirl`. What happens if you use `?c` and `help(c)`, not inside the swirl course? It seems this issue has been raised [before](https://github.com/swirldev/swirl/issues/317), suggesting to run `options(help_type = "text")` before running swirl. – Donald Seinen Apr 11 '22 at 06:57
  • This isn't exactly an R problem. What is happening is that your IDE (are you using RStudio?) is trying to open a browser to the help page but the process does not have permission. Are you trying this on a corporate network? If you run `tools::startDynamicHelp()`, it should produce the output `starting httpd help server ... done`. Does it? If not you may need to get permissions from your sys admin, or just load the help pages from the web (e.g. [here](https://stat.ethz.ch/R-manual/R-patched/RHOME/library/base/html/c.html) for `c`). – SamR Apr 11 '22 at 07:22

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