Hi,
I am working with a lab group analyzing 4 years of mark recapture data from a population of male butterflies (Becky Fuda is a member of this group). We are using a trap object of a single polygon. I am currently in the process of determining the buffer size of our mask object. I am trying to use mask.check in order to evaluate the effect of varying buffer width on the likelihood estimates of secr.fit. I have identified the point the at which the likelihoods become stabilized using LLonly=TRUE. However, I am unable to use LLonly=FALSE in order to create estimates. When using LLonly=FALSE, I receive this error message "Error in -newfit$fit$minimum : invalid argument to unary operator". I was wondering if you have any insights to this problem.
Thanks,
Genevieve