[R-pkg-devel] Issue: Function found when exporting methods from the namespace ‘raster’ which is not S4 generic: ‘all.equal’

[Patrick Giraudoux]

OK. Thanks Zhian. However what suprises me is that pgirmess namespace 
does not import any function from raster nor uses ‘direction’ or 
‘gridDistance’ and the package raster is not imported from the 
description file. raster is not in the Suggests either...

So I wonder why loading pgirmess can trigger such an error... and 
depends on loading other packages before (such as Matrix !)  in such 
case (but generally not, and never on CRAN checks).


Le 28/01/2022 à 16:26, Zhian Kamvar a écrit :
> The reason why Rtools was suggested was because CRAN takes some time 
> for the binaries to be built and people were trying to install it just 
> after raster was released.
> The solution is for the user to re-install the raster package from 
> CRAN in a fresh R environment.
>
> All the best,
> Zhian
>
>
> On Fri, Jan 28, 2022 at 6:03 AM Patrick Giraudoux 
> <patrick.giraudoux using univ-fcomte.fr> wrote:
>
>     Dear listers,
>
>     One user (in cc) has signaled a problem installing the package
>     pgirmess
>     (versin 1.7.1 on CRAN), with this message on loading:
>
>     > library(pgirmess)
>
>     Error: package or namespace load failed for ‘pgirmess’:
>
>     Function found when exporting methods from the namespace ‘raster’
>     which
>     is not S4 generic: ‘all.equal’
>
>     In addition: Warning message:
>
>     no function found corresponding to methods exports from ‘raster’ for:
>     ‘direction’, ‘gridDistance’
>
>     I cannot identify where the trouble comes from since:
>
>     - pgirmess goes through OK in all the checks on CRAN
>
>     - I can install/remove it with correct loading on my own platform
>
>     - pgirmess 1.7.1 does not import 'raster' and the functions
>     mentioned above
>
>     The user has installed the last R version on Windows. However, she
>     gets
>     a correct loading only if she loads 'Matrix' before (or 'lme4' -
>     but to
>     my knowlege, lme4 actually loads Matrix).
>
>     She meets also the same issuer with pgirmess 2.0 (not on CRAN yet,
>     see
>     https://github.com/pgiraudoux/pgirmess however this version (still on
>     test) has deprecated/dropped all functions related to dealing with
>     rasters.
>
>     This occurs in R directly (not necessarily within RStudio).
>
>     On the web, Iook likes this issue has is already been spotted for
>     some
>     other packages (e.g. mapview, tmap, etc.). Checking help-lists I saw
>     that installing rtools might solve the problem (e.g.
>     https://community.rstudio.com/t/error-package-or-namespace-load-failed-for-mapview/126914)
>
>     however, it seems to me a strange workaround since rtools should
>     not be
>     made necessary for lay R user (not developers).
>
>     Best,
>
>
>
>
>
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