is there any restriction for RUN /n ?

I tried:

RUN mysqldump -umyid -pmypass admdata > c:\backup1.txt
RUN /n mysqldump -umyid -pmypass admdata > c:\backup2.txt
RUN mysqldump -umyid -pmypass admdata > c:\backup3.txt /n

the first one (without /n) creates a complete backup file.
the second one (with /n) doesn't create any file.
the third on (with /n at the back) create an empty file

Thanks for the help.