The last time i tried it is some time ago so i dont know the exact error message, but the aatranslator itself was unable to open the aaf file. My version was uptodate and i contacted the programmer of aatranslator that time. As it was a small project (like always im doing post) i just rented protools, opened the aaf in there and bounced the tracks for reaper. I didnt had a dialogue with the editor to try different export versions as the project was quite small and i dont wanted to spend much time on things like that. But all projects i did (different editors, etc.) were similar unsuccessfull.