I am using the follwing to auto login and then run file containng a command.

C:\path\to\putty.exe -load "[Sessionname]" -l [user] -pw [password] -m C:\path\to\commands.txt

Commands.txt contains the following command

ps -elf|grep 'sometext'

but when I try to do so a new window for putty comes and exits instantly after login. I cannot see the output of command in commands.txt

What is the problem;. Is there error in my approach or I need some more command to make the putty window pause for sometime before exiting.