Update! I changed the "site" categories. I noticed that I had coded them as "North, South, East, West" on different islands, which may have caused confusion in the model.
Now I get a whole new error message! Error in glmmadmb(LESP.CHUCKLE ~ 1 + (1 | SITE/ISLAND), data = callsna, : The function maximizer failed (couldn't find STD file) In addition: Warning message: running command 'C:\windows\system32\cmd.exe /c "C:/Users/Rachel/Documents/R/win-library/2.14/glmmADMB/bin/windows32/glmmadmb.exe" -maxfn 500 -maxph 5 -noinit -shess' had status 1 I followed the instruction you gave to a similar error message posted in google groups (I downloaded version 0.7 and installed it): http://groups.google.com/group/admb-users/browse_thread/thread/56d665acfb756ac4 With no avail! Still get the same lousy error message! The following models work ok: mod <- glmmadmb(LESP.CHUCKLE~ 1+(1|SITE), data=callsna, zeroInflation=TRUE, family="nbinom") and mod <- glmmadmb(LESP.CHUCKLE~ 1+(1|ISLAND), data=callsna, zeroInflation=TRUE, family="nbinom") Any thoughts? Thanks so so much! Rachel Buxton -- View this message in context: http://r.789695.n4.nabble.com/glmmADMB-tp4616701p4619221.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.