There is no comma seperated ip address in the created file. i have repeated the process 5 times
if you have multiple IPs then you have to write in the given format.
if your test cases are failing, check the log file, you will get to know about the mistake.
hint - multiple IPs isnt the problem.
Multiple ips are hops ips and as @yashgoyal said multiple ips is not the problem you have to understand how ping works and read about ping and tracert command over google you will figure it out