My model does a bunch of
Rejecting initial value:
Log probability evaluates to log(0), i.e. negative infinity.
Stan can’t start sampling from this initial value.
And then it starts. But I would like to know what is triggering those rejections. I saw old posts where it says that the new (2.16) stan should report the line, but it’s not the case: I’m using rstan 2.16.2, and I’ve tried with one chain, but I don’t get any info. Do you have any tips on how to debug this?
(I’m a having a lot of troubles with chains getting stuck with a fairly complex model (the hierarchical version of the one I posted here.