problem WITH mcmcsamp function in lme4 on Mac OSX

I was wondering if anyone else had experienced this problem and maybe  
could identify it as a possible bug rather than a problem peculiar to  
my particular computer.
I have been trying to get confidence intervals via the mcmcsamp  
function in lme4 package but cannot get it to work on a mac running  
OS X. i ran exactly the same analyses on a PC with exactly the same  
commands and data and it worked fine. I removed both the matrix and  
lme4 packages from the library on the Mac (based on an unrelated  
problem with the lme4 package that I read about in the mailing list)  
and reinstalled them but to no avail. When I run the mcmcsamp  
function I get this error message (sorry its partly in french)

 > model.glmer4=glmer(leaves.eaten ~ Geocytotype+Cypho.origin + (1| 

TEST), data = cyphoplantfeeding, family=poisson)

 > summary(mcmcsamp(model.glmer4 , n = 10000))

Erreur dans .local(object, n, verbose, ...) : Update not yet written
Erreur dans summary(mcmcsamp(model.glmer4, n = 10000)) :
   erreur lors de l'?valuation de l'argument 'object' lors de la  
s?lection d'une m?thode pour la fonction 'summary'

The same script runs fine on a PC so is what is the "update not yet  
written" referring to?


Martin Henery
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