The ATM had dual nic card in which the macid and terminal id for zombie is different -The solution is to check if update mac-id payload went down and both macid and termianalid are same.
Database columns had some null values for two particular ATMs (from the time of Database migration). Checking it from tekexatm table and marking it as not null (some valid value), fixed the problem.
Below are the findings on the issue where HCP communication test was failing during the agent install. 1) In Hcpconfig.scr file the IP and Port details where on a single line as mentioned below. TimeoutInMins=200 FailureWaitTimeInMins=10 ...