Benedict,
> This again suggests that something is broken with my AWL. I think i'd > better delete it. > As it seems now, the only thing strange left is the AWL & related NaN. Please don't delete your AWL. I'll provide a patch which will reset a bad entry when it encounters one, so your db will be a good testground. Guenther wrote: > Looks like NaN sneaked into your AWL before. This is not the same as > getting NaN as a rule's score. Right. A NaN in AWL is just a consequence of your other rules producing a NaN result. Let's concentrate on how this came to be. Mark