Dear all,

I'm trying to run a ZIGLMM  with the package glmmADMB. My data set contains 37 zero-valued of 66 observations in the dependent variable (number of attaks), so I consider that a zero-inflated model would be appropriated. I checked the dataset and, apparently, there are enough variation for all combinations.

I centered and rescaled continuos input variables before performing the model. I run several models and they looked OK, but an error message appeared when trying some combinations, usually with only one explanatory  variable (but not in all cases!!) and with the null model (only random effects).
This is the full model:

model_full<-glmmadmb (Nat~ coldecoy+ colmale*colfem+sfecha+ snnd+ colvecino+ (1|Year) +(1|Nido),data=data, zeroInflation=TRUE,family="poisson")
summary(model_full)

and this is the error message:

model_7<-glmmadmb (Nat~ colfem+ (1|Year) +(1|Nido),data=data, zeroInflation=TRUE,family="poisson")
Parameters were estimated, but not standard errors were not: the most likely problem is that the curvature at MLE was zero or negative
Error en glmmadmb(Nat ~ colfem + (1 | Year) + (1 | Nido), data = data,  : 
  The function maximizer failed (couldn't find STD file) Troubleshooting steps include (1) run with 'save.dir' set and inspect output files; (2) change run parameters: see '?admbControl'
Además: Mensajes de aviso perdidos
comando ejecutado './glmmadmb -maxfn 500 -maxph 5 -noinit -shess' tiene estatus 1 

I found similar an almost identical question in the list (sorry, I was unable to find it again and I cannot give more details). I checked the ?admbControl and further explanations about this provided in a previous post, but it was unclear to me what should I do. 
Sorry if I'm repeating an already "solved" topic, but I was unable to find an answer.  I would be very grateful if someone can give me some help.

Best,

Laura
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