Issues with windows batch file loop

Question

I have the code to loop through a file with a list of servers followed by executing the nslookup command.

Code

setlocal EnableDelayedExpansion
set file=servers.txt
FOR /F %%i IN (%file%) DO (
set server=%%i
nslookup !server!
)

Issues

1. Even if there is a single line, it loops forever
2. The nslookup command returns no value

Answer 1

Since your batch file is called nslookup - the line nslookup !server! is calling the batch script itself with the argument !server! (of course this argument is not being used), instead of the actual nslookup command.

To fix the issue, you need to rename the batch file.