Hi Sanal,
WebNMS is unable to add the SnmpEngineEntry to the SnmpEngineTable. This is because, the configration/provisioning modules refer the SnmpDefaultProperties.xml file present under <NMS_HOME>/conf directory, for the DB related details like the DB URL, DB DRIVER, DBUserName, DB Password etc.
Configure proper values for these parameters in the SnmpDefaultProperties.xml file and then execute the provisioning template.
If you still face the problem, then send us your template and queries to
nms-support@webnms.com.
Regards,
Suresh