Hi John,
It looks like that the constraints on the dates with the 4 calibrations
are such that the penalized likelihood cannot be calculated. There are
several occasions when a value of -1e100 is returned (non finite value,
negative branch lenghts, ...) so it's hard to see what is the problem
As an update to my question--when I try to calibrate the tree itself using the
default single root calibration and default 1/1 min/max ages, the function
appears to run fine. When I add in my calibration table, the function exits
with the -Inf LL.
The tree is rooted. There are no duplicated
