[R-sig-ME] Problem with lmer

[Ben Bolker]

victoriah nyawira <nyaga.nyawira at ...> writes:

> Am running this code
> fixdslope <- lmer(score ~ logtime + (1 | id), data)
> but I get this error:
> Error in asMethod(object) : could not find function ".M.classEnv"
> The code ran in windows 7, R 1.14.2, but am currently using OpenSUSE 12.1,
> with the latest R 2.15.0.


 [snip]

  That's a rather odd error message.

.M.classEnv appears to be an internal Matrix function (e.g.
see [broken URL!]

https://r-forge.r-project.org/scm/viewvc.php/pkg/Matrix/R/zzz.R?
  root=matrix&r1=2765&r2=2764&pathrev=2765&diff_format=s

).  Have you run update.packages() [and/or update.packages(checkBuilt=TRUE),
and/or install.packages("Matrix")]?  What are the results of 
sessionInfo()?  Can you provide a reproducible
example?

   Ben Bolker