Hello,

I'm trying to fit a density surface model, following "Spatial models for
distance sampling data: recent developments and future directions" (Miller
et al. 2013 - Methods in Ecology and Evolution 4 (11): 1001-1010).

When I run the model, I get the following:
"warning messages:
1: Step size truncated due to divergence
2: Step size truncated due to divergence
3: Step size truncated due to divergence
4: Step size truncated due to divergence
5: Step size truncated due to divergence "

Then, when I try to use "predict", 17 grid cells (belonging to 5 groups)
appear as "Inf", instead of having a value. And that keeps from mapping the
predicted abundance or calculating the abundance for the entire survey area.

Can you please help me understanding what this means and how I can get
around this?

Thanks,
RICARDO.



-- 
Ricardo Faustino de Lima - http://sites.google.com/site/rfdelimasite/home

Post-Doc Researcher
Animal Diversity and Conservation -
http://cba.fc.ul.pt/members/ricardo_lima.php
Centre for Environmental Biology, Lisbon University Faculty of Sciences
Office 2.5.15b, Campo Grande 1749-016 Lisboa, Portugal.

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