Solution:

Create a “CSV” file.

The correct syntax is:
machine_name_or_ip_address,machine_description,OS,OS Version,SSH Type,SSH port

 
Example:
machine_name_or_ip_address,machine_description,OS,OS Version,SSH Type,SSH port
mymachine.symantec.com,production,Solaris,5.10,2,22
UATmachine.symantec.com,UAT,Solaris,5.10,2,22
10.1.1.1,production,Solaris,5.10,2,22
(continue this format until all computers are included) 

Note: Make sure that file format is saved as .csv once all the machines are included.