I am using R version 3.0.1 (2013-05-16) on Platform: x86_64-w64-mingw32/x64 (64-bit) and lme4_0.99999911-3. 
I run the following code from Douglas Bates "lme4: Mixed-effects modeling with R" (June 25, 2010) pg 14 and do not get any iteration information. 
I get the same results if I use verbose=TRUE or verbose=1L. 



> lmer(Yield~1|Batch,Dyestuff,REML=FALSE,verbose=1) 
Linear mixed model fit by maximum likelihood ['lmerMod'] 
Formula: Yield ~ 1 | Batch 
Data: Dyestuff 


AIC BIC logLik deviance 
333.3271 337.5307 -163.6635 327.3271 


Random effects: 
Groups Name Variance Std.Dev. 
Batch (Intercept) 1388 37.26 
Residual 2451 49.51 
Number of obs: 30, groups: Batch, 6 


Fixed effects: 
Estimate Std. Error t value 
(Intercept) 1527.50 17.69 86.33 


I noticed this in the structure of the output: 

..@ optinfo:List of 4 
.. ..$ optimizer: chr "Nelder_Mead" 
.. ..$ control :List of 1 
.. .. ..$ verbose: int 0 
.. ..$ conv : num 0 
.. ..$ warnings : list() 
Please advise me on how to obtain iteration information with lmer. 


Thanks, 


Roy Robertson 


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