[R-pkg-devel] Cannot implement test configuration

[Tomas Kalibera]

On 9/2/25 23:44, Ivan Krylov via R-package-devel wrote:
> On Tue, 2 Sep 2025 06:23:24 +0000
> "Hüsing, Johannes via R-package-devel" <r-package-devel using r-project.org>
> wrote:
>
>> Error: [EPERM] Failed to stat '//some_servername/UserHome$':
>> operation not permitted
> What's the traceback() output immediately after this error happens? If
> you post it, someone may be able to point out the offending code and
> perhaps find a way to convince it to use the drive letter instead of
> the UNC path.
>
> Since the error is encountered by code in 'usethis' (or somewhere
> downstream), likely not in base R, you may also get a more direct
> answer by following links at <https://usethis.r-lib.org/SUPPORT.html>.

A common cause of such problems is path normalization.  Base R tries not 
to introduce UNC paths, e.g. path normalization of a path including a 
drive letter tries not to turn that path into UNC, exactly for this 
reason: there are tools around, not just R, that do not fully support 
UNC paths.

Tomas

>