Hi Simon,
Many thanks for your help
As advice, After setting break-point on the class, I try to debug the background job.
I am getting below issue details .System issue messages “ Package "000000001" started at "26.02.2016 07:57:48" was finished with a fatal error “due to Invalid value 'EMAIL_OUTBOUND-EMAIL' for attribute 'IA_TYPE-COMM_MEDIUM'
Message No. CUAN_INTERACTION000
Kindly let me know what setting need to fix for this
Regards,
Aniruddha