Was reviewing my Jockey-Trainer UDM's and noticed that I got 0 winners showing when I know there have been winners. This is when I have both the Trainer Name Test and Rider Name Test checked.
Haven't had this problem at all. My first best guess would be a name mismatch between the way a name is listed in the UDM vs the way it is listed in the Data File. Shoot me a name or two and I'll take a look.