Operating System commands in FTP adapter

Hi

I have a requirement to use "Operating System Command" option in the Sender/Receiver side File Adapter.

And in help.sap.com they have brief notes on this.

http://help.sap.com/saphelp_nw04/helpdata/en/bc/bb79d6061007419a081e58cbeaaf28/content.htm

When I tried to execute some valid DOS commands like MKDIR,RENAME etc it didn't work at all.

But process has been sucessfully completed without any error!!!

System : XI 3.0 SP 11

Can anyone has any inputs on this ? Pls share me some ideas with example. Is there is any limitations on this feature?

Note: When I tried to give invalid commands hfjkhfkasdjfh,asdjdhas etc, still it is not giving any error!!. Still my File Adapter as well as entire process is successfully completed.