BRbackup is failing with signal 15

Hi all

i am facing below problem while backing up .

BR0280I BRCONNECT time stamp: 2007-05-09 09.35.30

#BEGIN /oracle/SID/sapdata5/btabd_3/btabd.data3

#BEGIN /oracle/SID/sapdata5/btabd_1/btabd.data1

#BEGIN /oracle/SID/sapdata5/btabd_12/btabd.data12

BR0280I BRCONNECT time stamp: 2007-05-09 09.35.30

BR0280I BRBACKUP time stamp: 2007-05-09 12.45.36

BR0261E BRBACKUP canceled by signal 15

BR0278I Command output of '/usr/sap/SID/SYS/exe/run/brconnect':

BR0801I BRCONNECT 6.40 (9)

PID=25587

#SIGNAL CAUGHT: 15

#INBACKUP Table name

SID has been changed due to security reason.

is anybody come to this type of problems

Thanks in advance