I'm not sure you had to update, but you definitely did have to re-install
(that is, I think your problems might also have gone away if you had simply
re-installed version 0.10.6) -- on the other hand, there's no reason that I
know of not to upgrade, and CRAN actually makes it easier to upgrade than
to re-install an old version ...


On Fri, Feb 21, 2014 at 12:32 AM, Hugo Quené <H.Quene@uu.nl> wrote:

> Dear list members,
>
> Since a few days I've had difficulties in using lme4_1.0-6 (CRAN binary
> version) on a MacBook8,1.
> My call to lmer() resulted in an error message:
>
> > (fm1 <- lmer(Reaction ~ Days + (Days | Subject), sleepstudy))
> Error in initializePtr() :
>   function 'dataptr' not provided by package 'Rcpp'
>
> A repeated call of lmer() caused R to crash entirely.
>
> As it turned out, this problem disappeared after I updated package Rcpp
> from version Rcpp_0.10.6 to Rcpp_0.11.0 (CRAN binaries). When lme4 was
> installed it did warn about an obsolete version of the Matrix package, but
> it did not complain about the Rcpp package. Hence the solution to update
> Rcpp might be useful to have in the list archive, for others experiencing
> similar problems.
>
> With kind regards, Hugo Quené
>
> --
> Dr Hugo Quené | assoc prof | Dept Languages Literature and Communication
> | Utrecht inst Linguistics OTS | Utrecht University | Trans 10 | 3512JK
> Utrecht | The Netherlands | +31 30 253 6070 | www.uu.nl/hum/staff/HQuene
> | uu.academia.edu/HugoQuene |
>
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>

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