[R-sig-ME] lme error message

[Stuart Luppescu]

On 木, 2009-07-23 at 04:17 -0400, Luca Borger wrote:
> Hello,
> 
> >  Singularity in backsolve at level 0, block 1
> 
> in fact my experience is that in this case there is some problem with
> the fixed effects (e.g. not enough data for all factor combinations
> etc.), otherwise it would say level 1 or higher. By fitting a simpler
> model usually it disappears.
> 
> Disclaimer: just limited empirical experience, I have never checked
> the code to understand better this error message, so take this with
> caution ;-)

I found the problem. One of my predictors was all 0s. (Dumb me.) Thanks
to everyone for the help.

-- 
Stuart Luppescu -=-=- slu <AT> ccsr <DOT> uchicago <DOT> edu
CCSR at U of C ,.;-*^*-;.,  ccsr.uchicago.edu
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[Crash programs] fail because they are based on the theory that, 
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