R help - Jan 2014 - glmmADMB error

I ran an example using glmmADMB, and I got this error:

data(bacteria,package="MASS")
bacteria$present <- as.numeric(bacteria$y)-1
(bfit <-  glmmadmb(present ~ trt + I(week > 2), random = ~ 1 | ID,
+ family = "binomial", data = bacteria))

Error in paste0(symbol1, paste0(paste0(var, collapse = symbol2))) :
  argument "symbol1" is missing, with no default

Any ideas?

R version 3.0.2 (2013-09-25)
Platform: x86_64-apple-darwin10.8.0 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] splines   stats     graphics  grDevices utils     datasets  methods
base

other attached packages:
[1] multcomp_1.3-1    TH.data_1.0-3     survival_2.37-7   mvtnorm_0.9-9997
 data.table_1.8.10 glmmADMB_0.7.7    R2admb_0.7.10
[8] MASS_7.3-29       foreign_0.8-59

loaded via a namespace (and not attached):
[1] grid_3.0.2      lattice_0.20-24 Matrix_1.1-1.1  nlme_3.1-113
 sandwich_2.3-0  tools_3.0.2     zoo_1.7-10

-- 
Sebastián Daza

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