[R-sig-ME] error message in glmmADMB
rodriguero at ege.fcen.uba.ar
Wed Aug 28 20:39:34 CEST 2013
Dear list members,
I am trying to fit a glmmADMB model on my data, but altough I tried to fix
it after reading many tutorials and forums, I couldn't do it.
My response variable is the clutch size of females treated with an
antibiotic or untreated (control females), and I took data over many days.
Because lots of females put 0 eggs, I chose negative binomial over poisson
The model looks like this:
model A= glmmadmb(count~treatment+(time|female),family="nbinom",data=table1)
This is the error message:
Parameters were estimated, but not standard errors were not: the most likely
problem is that the curvature at MLE was zero or negative
Error in glmmadmb(count ~ treatment + (time | female), family =
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'
In addition: Warning message:
running command 'C:\Windows\system32\cmd.exe /c
-maxfn 500 -maxph 5 -noinit -shess' had status 1
"Count" is the clutch size, my response variable, 'treatment' is a fixed
effect, because I want to distinguish between clutch size of treated vs.
untreated females, and "time" and "female" are random effects because of the
pseudorreplicate (i.e. random effects as nuisance).
Any idea of what is wrong? Thanks in advance!
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