[ADMB Users] function maximizer failed

[Niklaus Kuehnis]

Hi all,

Trying to fit a negative binomial mixed model, the following error occurs:

glmm2 <- glmm.admb(intrans3 ~ hom, random = ~1, group = "nr",
         data = mixed2.d, family = "nbinom", verbose = TRUE)
# Error in glmm.admb(intrans3 ~ hom, random = ~1, group = "nr", data = 
mixed2.d,  :
#   The function maximizer failed
# In addition: Warning message:
# In shell(cmd, invisible = TRUE) :
# 
'"C:/Users/Username.DOMAIN/Documents/R/win-library/2.13/glmmADMB/bin/windows/nbmm.exe" 
-maxfn 500 ' execution failed with error code 1

I tried several predictor variables, family = "poisson", adding zero 
inflation and different random effects. There are two lines per subject 
(subject id = "nr"). Intrans3 has something like a zero inflated 
negative binomial distribution. hom is monomodally, approximately 
symmetrically distributed.

Is there anything wrong with my syntax?

R 2.13.1 on Windows Vista.

TIA,
Niklaus