"Unable to open/create leveldb" after I have followed the guide in ripple wiki

[amarcord]

I have configured the "rippled .cfg" correctly, set the [node_db], set my VM to 4G ram, and sometimes it's running successfully, but these days it has always been "Unable to open/create leveldb: IO error: db/hyperldb/LOCK: No such file or directory".
My system is ubuntu 13.10. I don't know what's wrong...

[amarcord]

My db folder has the LOCK file, and when I use "top", a few of rippled main processes is running, the leveldb folder has flashed per few seconds...
rippled stop,no response
rippled server_info,no response
and still unable to open/create.....

[Sukrim]

I'd recommend you to post your problems in the Ripple forum instead of bitcointalk...

Anyways, just kill all running rippled processes and start with "rippled --net".
Maybe you have a relative, not an absolute path there?