[R-SIG-Mac] lme4 print and summary errror

[Douglas Bates]

Andrew Beckerman wrote:
> Hi all - (this is posted to r-help and R-SIG-MAC)
> 
> OSX 10.3.7, R 2.0.1, lme4/Matrix/latticeExtra latest, fresh install of 
> R. MASS loaded (or not).
> 
> I am getting an error message for the print() and summary() commands 
> with all lme models I try and run in lme4 (GLMM's work fine).  Using the 
> example from the lme help, summary and print produce the following 
> errors, despite the model being fit, as indicated by VarCorr() and 
> examination of str(fm).  Any ideas?
> 
> (I can't reproduce this on a windows95 install of 2.0.1, so I am 
> guessing it may be a mac thing at the moment?  This happens with the 
> binary or the source installation of lme4.)
> 
> Cheers
> andrew
> 
>  > data(bdf)
>  > fm <- lme(langPOST ~ IQ.ver.cen + avg.IQ.ver.cen, data = bdf,
> +           random = ~ IQ.ver.cen | schoolNR)
>  > summary(fm)
> Error in verbose || attr(x, "verbose") : invalid `y' type in `x || y'
>  > fm
> Linear mixed-effects model fit by   Data: NULL
>   Log-likelihood: NULL
>   Fixed: list()
> NULL
> 
> Length  Class   Mode
>      0   NULL   NULL
> Number of Observations:
> Number of Groups: Error in 1:dd$Q : NA/NaN argument
>  > VarCorr(fm)
>  Groups   Name        Variance Std.Dev. Corr
>  schoolNR (Intercept)  8.07702 2.84201
>           IQ.ver.cen   0.20806 0.45614  -0.642
>  Residual             41.34942 6.43035
> 
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Check what packages you have loaded.  It looks as if you have loaded 
lme4 and nlme at the same time and you their methods will conflict.