Lme4 - maximum number of function ratings exceeded

Question

I am running simple GLMM with lme4 ...

model1  <- glmer.nb(S ~ Days*Grazing*Biome + (Days|Site), data=mydata, verbose=T, control=ctrl)

... and run convergence code 1 from bobyqa: "bobyqa - maximum number of function ratings exceeded." So I looked through stackoverflow and found this interesting thread.

I redid my control object, which now looks like this:

ctrl = glmerControl(optimizer = "bobyqa",
                    #restart_edge=T,
                    boundary.tol = 1e-5,
                    calc.derivs=TRUE,
                    use.last.params=FALSE,
                    sparseX = FALSE,
                    tolPwrss=1e-7,
                    compDev=TRUE,
                    nAGQ0initStep=TRUE, 
                    ## optimizer args
                    optCtrl = list(maxfun = 1e5))

But I still get the same error. Then I followed another link that said that

• you can use control = glmerControl (optCtrl = list (maxfun = 1e5)) to configure the maximum number of function evaluations. CHECK
• if @optinfo $ feval tells you how many function evaluations were actually used. TBD

, model1 @optinfo $feval, ... 172

, - , 1e3 1e8, .

lme4 - 1.1-10; 64- R3.1.3 (, R?)

(!) !