Hi ocaml folks

I have a C program that makes callbacks to the OCaml runtime via the 
callback_exn() mechanism. Unfortunately, the OCaml code is raising some 
exception. It seems to be one of the built-in OCaml exceptions, and not 
something that I have defined in my OCaml code.

I would like to know what is the easiest/correct way to identify the 
exact OCaml exception being raised, so I can debug this program.

Thank you
Raj