Hi Hopefully this is the right place to ask. If not, my apologies for that. I've just spent 2 hours looking for the inverse error function in the built-in functions of the gnu compiler. I can't seem to find it. Is there a reason for that, or am I overlooking anything? Regards, Boudewijn ____________________________________________________ On Yahoo!7 Photos: Unlimited free storage ? keep all your photos in one place! http://au.photos.yahoo.com