I've read numerous threads about this now, and ref to this one
there isn't even a known problem with this thing.
I can't get it working. Just tried on my laptop which I've always used for smanager, and adding an af gauge gives me the floating point error. Tried deleting everything and installing smanager again (newest version), tried deleting all the displays, the ini, tried changin lamda -> air to fuel, and checked the conversion table.
so I gave up, and tried on a completely vanilla installation of win7.
Downloaded and installed smanager
open it up
add a new bar graph
choose sensor -> AF
Floating point division by zero
downloaded kpro manager on both machines and there AF works.