Minidlna strange behaviour

[lwizard]

MiniDLNA during scan give me an error. This error is random, in fact I have reduce my files to few folders, when I enable MINIDLNA in firmware sometimes it give me and error and sometimes not with the same folders, so it doesn't seem to be a corrupted file. I'm with Merlin 53.

FIRST RUN:
2015/04/29 14:53:28] minidlna.c:1172: warn: Starting MiniDLNA version 1.1.4.
[2015/04/29 14:53:28] minidlna.c:357: warn: Creating new database at /tmp/mnt/Media/Photo/.minidlna/files.db
[2015/04/29 14:53:29] minidlna.c:1211: warn: HTTP listening on port 8200
[2015/04/29 14:53:44] playlist.c:125: warn: Parsing playlists...
[2015/04/29 14:53:44] sql.c:117: warn: sql_get_int_field: step failed: SQL logic error or missing database
SELECT count(*) from DETAILS where MIME glob 'a*'
[2015/04/29 14:53:45] playlist.c:259: warn: Finished parsing playlists.
[2015/04/29 14:53:59] upnphttp.c:1052: warn: HTTP Connection closed unexpectedly
[2015/04/29 14:54:16] minidlna.c:156: warn: [2015/04/29 14:54:16] minidlna.c:156: warn: received signal 15, good-b$
received signal 15, good-bye

DISABLED AND RE-ENABLED (SAME FILES):
[2015/04/29 14:54:29] minidlna.c:1172: warn: Starting MiniDLNA version 1.1.4.
[2015/04/29 14:54:29] minidlna.c:357: warn: Creating new database at /tmp/mnt/Media/Photo/.minidlna/files.db
[2015/04/29 14:54:29] minidlna.c:1211: warn: HTTP listening on port 8200
[2015/04/29 14:54:44] playlist.c:125: warn: Parsing playlists...
[2015/04/29 14:54:45] playlist.c:259: warn: Finished parsing playlists.

What do you think about?

Is it normal that with TOP command I see 3 istances of minidlna?
12136 1 admin S 6032 2% 0% minidlna -f /etc/minidlna.conf -R
12142 12136 admin S 6032 2% 0% minidlna -f /etc/minidlna.conf -R
12143 12142 admin S N 6032 2% 0% minidlna -f /etc/minidlna.conf -R