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Are you using OCaml 3.10?  I recall there's a bug that doesn't let you #use 
more than once due to bad file descriptors.  It's been fixed in 3.11

Peng

On Thursday 26 March 2009 09:59:20 pm Andre Nathan wrote:
> Hello
>
> I have the simple program below:
>
>   let () =
>     Sys.interactive := false;
>     Toploop.initialize_toplevel_env ();
>     for i = 1 to (Array.length Sys.argv) - 1 do
>       ignore (Toploop.use_file Format.std_formatter Sys.argv.(0))
>     done
>
> which works fine when compiled with
>
>   $ ocamlc -o a toplevellib.cma a.ml
>
> and run as
>
>   $ ./a foo.ml bar.ml
>   val a : int = 1
>   val b : int = 2
>
> Both files are processed correctly. However, if I add camlp4 to the
> compilation options, as in
>
>   $ ocamlc -o a toplevellib.cma -I +camlp4 camlp4o.cma a.ml
>
> the first file is processed, but then I get a bad file descriptor error
> for the second one:
>
>   $ ./a foo.ml bar.ml
>   val a : int = 1
>   I/O error: Bad file descriptor
>
> Does anyone know what could be going on here?
>
> Thanks,
> Andre
>
>
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