mysqlbackup: INFO: Could not find binlog index file. binlogs will not be copied for this backup. Point-In-Time-Recovery will not be possible.

[Dragan Radovanovic]

Hi,
Sorry if this question has been already questioned (I have tried to find answer searching the forum, but I didn't succeed). Also I am novice in mysql server.
I have used mysqlbackup utility (MySQL Enterprise Backup version 3.12.1 Linux-2.6.27.19-5-default-x86_64 [2015/06/26]) to make full database backup using next command:
/root/Install/meb312/meb-3.12.1-sles11-x86-64bit/bin/mysqlbackup -uroot -p --backup-dir=/tmp/backup/level0_sun backup

I have backed up mysql server (mysqlbackup: INFO: MySQL server version is '5.5.37-enterprise-commercial-advanced-log').

I get next message in the output of this backup command:
.......
.......
150910 12:08:33 mysqlbackup: INFO: Starting to copy all innodb files...
mysqlbackup: INFO: Could not find binlog index file. binlogs will not be copied for this backup.
Point-In-Time-Recovery will not be possible.
If this is online backup then server may not have started with --log-bin.
You may specify its location with --log-bin-index option.
.......
.......

MySQL instance is started with configured bin logs in /etc/my.cnf file:
log-bin=/data/logs/binary/changelog
log-bin-index=/data/logs/relay/binarylog.index

Content of the folder /data/logs/binary is:

drwxr-xr-x 4 root root 4096 Sep 9 15:17 ..
-rw-rw---- 1 mysql mysql 126 Sep 9 15:20 changelog.000001
-rw-rw---- 1 mysql mysql 126 Sep 9 15:31 changelog.000002
-rw-rw---- 1 mysql mysql 126 Sep 10 11:57 changelog.000003
-rw-rw---- 1 mysql mysql 380 Sep 10 12:12 changelog.000004
drwxr-xr-x 2 mysql mysql 4096 Sep 10 12:12 .
-rw-rw---- 1 mysql mysql 337 Sep 10 12:58 changelog.000005

My question is why I get this message on the output even if my database is configured to use bin logs and the binlog index file.
Please advice.

Thanks,
d.