when i try to remove the BerkeleyDB environment, i find only part of the feature is implemented in both BerkeleyDB 0.31 and 0.32, that is, there is only the env_remove function provided, which is not documented, it calls _env_remove, but no _env_remove provided. i think it is easy to do this, so i do it myself. i don't know why Paul didn't do that.