The below suggestion worked: I installed the updated Matrix package and
updated the lme4 package. Thanks.

On Tue, Sep 20, 2011 at 4:28 AM, Mike Lawrence <Mike.Lawrence@dal.ca> wrote:

> lme4 works fine for me on my air running Lion. What version of R are
> you running? The Matrix package was recently updated, which warned
> that users should subsequently update lme4, so maybe try
> install.packages("Matrix") then install.packages("lme4").
>
> Here's my sessionInfo()
>
> R version 2.13.1 (2011-07-08)
> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
>
> locale:
> [1] en_CA.UTF-8/en_CA.UTF-8/C/C/en_CA.UTF-8/en_CA.UTF-8
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] lme4_0.999375-40   Matrix_0.999375-50 lattice_0.19-30
>
> loaded via a namespace (and not attached):
> [1] grid_2.13.1   nlme_3.1-101  stats4_2.13.1
>
>
>
>
> On Wed, Sep 14, 2011 at 10:33 AM, Andrea Armstrong
> <armstrong.usu@gmail.com> wrote:
> > I am unable to run the lme4 package on my MacBook Pro with the Lion
> operating system.  Is there a workaround for this package? Is one under
> development?
> >
> > Thanks, Andrea
> > _______________________________________________
> > R-SIG-Mac mailing list
> > R-SIG-Mac@r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-sig-mac
> >
>

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