On 3/3/06, oleg@pobox.com <oleg@pobox.com> wrote:
>
> Jacques Garrigue wrote:
> >> Fatal error: exception Invalid_argument("output_value: abstract value
> >> (Custom)")
>
> > it just says that the marshaller encountered a custom C value.
>
> But there are no such values in my code: C functions return either
> Val_long, Val_unit, or a tuple with the tag 0 rather than
> Custom_tag. The custom value must be referenced in the custom stack
> fragement...
>
It can also come from an open io handle or threads (I doubt you are using any).

Regards,
Till