getting error "remote path must start with a module not a /"

[Scott Chapman]

I'm running rsync  version 2.5.4  protocol version 26 on redhat 7.3.
My rsync command is this:

rsync -vvplpotrRn --progress --password-file=/root/rsync_password /*.* 
root at 192.168.0.254::/home2/600xbackup

I get this error when I run it:

ERROR: The remote path must start with a module name not a /
rsync error: error starting client-server protocol (code 5) at main.c(885)

I want to backup my laptop to a directory on my server.  Is this the right way 
to run it?

What is the meaning of this error?

TIA,
Scott