Too many derivatives
For a model with a large number of variables, the number of columns of 3rd order derivatives used at the end of dynamic.json and static.json is larger than an Int32 and appears as a negative number.
This raises a more general question: is there in the code a protection against computing an unreasonable number of (higher order0 derivatives when asking by mistake or lack of knowledge too high an order of approximation for a large model?