[R] LME without convergence

Ralf Sommerfeld sommerfeld at mpil-ploen.mpg.de
Wed Feb 28 12:57:04 CET 2007

Dear R-help list readers,

I am fitting a mixed model using the lme function (R V 2.3.1 for 
Windows). This is an example:

treat<-c(1,1,1,1,1,1,1,0,0,0,0,0,0,0) #factor

If I now fit a model with random slopes as well as intercepts:


R encounters the following problem:

Fehler in lme.formula(dep ~ yes, random = ~yes | treat) :
         iteration limit reached without convergence (9)

Following other instructions on that problem, I tried to adjust the 
iteration limits and tolerances using lmeControl(), however this did not 

Can someone help me?

Best regards,

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