I assume you meant to post this note on a different thread...

OEF### files are the saved SmartFinder results files. When a user performs a SmartFinder search, the information is remembered until the application is closed. It is these files where the search results are saved. There are control files OEFCTL'I and OEFCTL'R that keep track of all the results files.

Failing to find records within a Smartfinder search is different than receiving an error message. It may be that the defined search is not properly defined and thus won't find what you think it should. Especially if you are using AND and OR and not getting the syntax correct.