[R-pkg-devel] Error ... could not find function ...
r@turner @end|ng |rom @uck|@nd@@c@nz
Wed Aug 14 07:44:09 CEST 2019
I am encountering an error that I cannot understand in a package that I
have built (currently just for personal use; not uploaded to CRAN).
In this package ("ldEst") I have a function ldFit() which calls the
function brm() from the brms package. The function brm() makes heavy
use of the Rcpp package.
When I invoke ldFit() (in the appropriate manner) it duly calls brm()
and issues messages
> Compiling the C++ model
(this takes a while) and then
> Start sampling
immediately after which it issues the error message:
> Error in cpp_object_initializer(.self, .refClassDef, ...) :
> could not find function "cpp_object_initializer"
The function cpp_object_initializer() is to be found in the Rcpp
package. I have import("Rcpp") in the NAMESPACE file for "ldEst"
which I thought would make everything from Rcpp available --- but
If I put a browser() into ldFit(), just before the call to brm(), I
can access cpp_object_initializer() from the browser() prompt. So why
cannot brm() access this function?
An irksome aspect to all this is that "*it used to work*". I haven't
invoked ldFit() in such a way that brm() gets called upon, for quite
some time. But the *last* time (some months ago) that I did so, it
worked just fine. Something has changed in the intervening months!
Can anyone suggest how I might solve this conundrum ? Do I need to
say something other than import("Rcpp") in my NAMESPACE file? What else
can I try?
Thanks for any insights.
 Not to be confused with a birth control device.
P.S. I could probably, with a bit of effort, put together a toy package
that would yield a reprex, if this is deemed necessary.
Honorary Research Fellow
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
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