A beginner question on Nmap:

There is a target ip list on the Kali desktop and I wanted to scan the ip address list in the target text file. I tried the command provided in the briefing, which is nmap -iL target-ip-list.txt

1. Run Nmap against the IPs found in the target-ip-list.txt file on the Kali Desktop.

It is the activity questions for nmap ep.3

The command is not working for me and can anyone help please? 
Thanks,