Another possibility (from the one Gang mentioned) is that you
are looking for spaces, but there is some other 'whitespace'
character, such as a tab, or even a carriage return (from typing
your script using a W!nd*ws PC or some Mac editors).
If you are running this script from a file (as opposed to pasting
it like Gang suggested), put the word "echo" before 3dttest,
and see what the output is.
Of course, if you had broken your line up, there should be some
"Command not found." error, too. Is there one?
- rick