Dear All,
I am trying to run Medusa on a large phylogeny with 8,000 tips.  When I give
the species richness values in a CSV file, I get the following error message
shortly after the analysis reports the AICc threshold:
Error in optimize(f = foo, interval = c(log(par[1]/2), log(maxVal))) :
invalid 'xmax' value
If I remove the richness flag, the analysis runs as its supposed to.  Has
anyone seen this problem before? Am I merely trying to run the analysis with
too big of a tree?
Thanks for any input.

Jacob B Landis, PhD
Postdoctoral Researcher
Department of Botany and Plant Sciences
University of California Riverside

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