[syslog-ng]issues using NOT in an filter.

Hello all, I can't seem to figure this out. I want to log level(info) and facility(authpriv) to my messages file, but I don't want to see facility(local4). Now some of the facility(local4) messages are level(info) but I still don't want them. Anyway, I was trying something like this and it doesn't work: filter f_messages { (level(info) or facility(authpriv)) not facility(local4); }; I tried using () to clean it up and that doesn't work. In all of the combinations I tried it simply will not parse the config file with NOT in the filter unless I put an and in front of it like this: "and not" Anyone have a sec to help me out with this? Thanks, schu