[R-pkg-devel] problem with regdmp finding v4.2.x under Windows

[Greg Hunt]

Jonathon,
Are you using a very old version of regdump?  Could it be a 32 bit
version?

Greg

On Tue, 5 Jul 2022 at 12:00, Jonathan Godfrey <A.J.Godfrey using massey.ac.nz>
wrote:

> Hi all,
>
> In order to support my local students and other blind users, I install
> every version of R and re-build every document used, almost all of which
> are R markdown documents.
>
> That means re-installing or updating packages as if I was a novice user
> following instructions. I try to give my students a clean start experience
> at the beginning of semester so that we're all using the same versions, and
> gives me time to sort out the messes before semester begins.
>
> To do all of that efficiently, I make extensive use of batch files
> (Windows user alert) and a key ingredient of those batch files is that I
> avoid having to edit the R version number with each installation.
>
> I've been using a Windows utility called regdmp to look in the registry
> for the highest version number. Up to v4.1.3, that was working extremely
> well for me.
>
> In addition, I've been investigating quarto, and have struck the same
> problem because quarto looks for the path to Rscript.exe using the regdmp
> utility. I've had help from the quarto team, and we've established that the
> regdmp utility should be finding a version of R if one exists. On my newish
> laptop where there is just one R installation (4.2.0) regdmp fails to find
> any installation because it has an "Access denied" error message.
>
> On my older desktop which has multiple R installations, I do not get an
> "Access denied" error, quarto finds the path to the 4.2.0 installation via
> brute force, but regdmp via my batch files gives me 4.1.x instead.
>
> I'm currently able to provide the service to my students I want, but only
> by doing all R work by explicitly naming the version of R I want used. I
> really do want to get back to my previous workflow so that I just install
> new versions of R and carry on.
>
> I'm now seeking your advice on the differences in installation of versions
> 4.2.x and 4.1.x that could have an impact on the Windows registry and
> therefore regdmp's ability to find the relevant entries there.
>
>
> Many thanks,
> Jonathan
>
>
>
>
>
>
>
>
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