> I am a student in Computer Science in the University of Evry (France),
> and I tried to compile a simple ocaml program :
> 
> let rec fact = function
> 0 -> 1 | n-> n*(fact(n-1));;
> 
> Unfortunately, the "ocamlopt 1fact.ml" command gave me the following
> answer :
> 
> I think this is due to the name of the program, 1fact.ml, which should
> not begin with a number, because when I renamed the file fact1.ml it
> worked perfectly.

Correct.  The name of a Caml compilation unit is derived from its
source file name (e.g. fact1.ml --> Fact), and must be a valid Caml
identifier.

> Is it normal?

Well, it could be argued that the compiler should check the file names
and emit a more descriptive error than the one you obtained.  But
since you understood the problem perfectly well and found the fix
yourself... :-)

- Xavier Leroy
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