Stephen Hewitt wrote: This is not the case: It is the "/Od" option which does this, this is distinct from the "/Zi" option (and friends) which controls the generation of debug info. Oops. I forgot we weren't using GCC :-O. If you specify -g to GCC to enable debugging, it also disables optimisations unless you specifically tell it to reenable then with a -O. You're right, of course :) I spend far to much time doing linux development :sigh: Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"