rsync error: protocol incompatibility

ERROR: rsync error: protocol incompatibility (code 2) at compat.c(171) [sender=3.0.6]

I use rsync with ssh and authorized key files for auto login to mirror a remote system to the local one.The only change I made was on my .bashrc on the remote end I added in some commands to show file system usage. do a du -f and a tail of the log on login for conveniences.

My assumption here is that when rsync executes the ssh to connect it received 'junk'. Once I removed the extra output from the .bashrc file on the remote end, it worked just fine.SO check your remote end for .profile, .bashrc, .bash_profile etc.... any scripts running that add extra output on login.