we were actually able to do this by eliminating the presets in Final Cut Hardware folder structure, under languages (believe it or not. We eliminated any foreign language folders, then dug into the english language folder to find the presets.
the files in question were rendered successfully by others in adjacent FCP suites. We are a 12 machine house. We are all running FCP 6.0.4… It seems like my software (or my Mac) does this with every red bar render I try.