[Rcpp-devel] Error: .onLoad failed in loadNamespace()

[Romain Francois]

Le 28/05/11 04:04, Dirk Eddelbuettel a écrit :
>
> Hi Laurent,
>
> On 27 May 2011 at 17:17, Laurent Gatto wrote:
> | Dear all,
> |
> | A basic packages with Rcpp modules produces the warning described
> | below, that I would ideally, with your help, get rid of.
> |
> | Rscript -e "require(Rcpp); Rcpp.package.skeleton(module=FALSE)"
> | R CMD check anRpackage
> |
> | produces obvious warnings related to badly formatted documentation and
> | license. However
> |
> | Rscript -e "require(Rcpp); Rcpp.package.skeleton(module=TRUE)"
> | R CMD check anRpackage
> |
> | produces this additional warning that puzzles me:
> |
> | [ ...checker output... ]
> | * checking whether the name space can be loaded with stated
> | dependencies ... WARNING
> | Error: .onLoad failed in loadNamespace() for ‘anRpackage’, details:
> |   call: value[[3L]](cond)
> |   error: failed to load module yada from package anRpackage
> | Execution halted
> |
> | A namespace must be able to be loaded with just the base namespace
> | loaded: otherwise if the namespace gets loaded by a saved object, the
> | session will be unable to start.
> |
> | Probably some imports need to be declared in the NAMESPACE file.
> | [ ...checker output...]
> |
> | I suspect this may be related to the yada module not being exposed and
> | thus not available when the package is loaded. Any further explanation
> | or hints would however be warmly appreciated.
>
> I think you are pretty close. As I recall, this 'warning' has been a bit of a
> wart that won't quite go away.  I just checked again what we do in the unit
> tests in file runit.Module.client.package.R: we build a package (ie create a
> tar.gz) and then install from it.  That also triggers the warning, but passes
> it.
>
> Romain may have more details about how this is related to module
> initialization and startup.
>
> Dirk

I'll have a go at installing a fresher R-devel and see what the next 
move is. My guess is that R checks are tighter now.

> |
> | sessionInfo() is appended below.
> |
> | Thank you very much in advance.
> |
> | Best wishes,
> |
> | Laurent
> |
> |
> |>  sessionInfo()
> | R version 2.14.0 Under development (unstable) (2011-05-04 r55760)
> | Platform: x86_64-unknown-linux-gnu (64-bit)
> |
> | locale:
> |  [1] LC_CTYPE=en_GB.utf8       LC_NUMERIC=C
> |  [3] LC_TIME=en_GB.utf8        LC_COLLATE=en_GB.utf8
> |  [5] LC_MONETARY=C             LC_MESSAGES=en_GB.utf8
> |  [7] LC_PAPER=en_GB.utf8       LC_NAME=C
> |  [9] LC_ADDRESS=C              LC_TELEPHONE=C
> | [11] LC_MEASUREMENT=en_GB.utf8 LC_IDENTIFICATION=C
> |
> | attached base packages:
> | [1] stats     graphics  grDevices utils     datasets  methods   base
> |
> | other attached packages:
> | [1] Rcpp_0.9.4.1


-- 
Romain Francois
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