Hi,
Error code 0xC (decimal 12) means "Error in rsync protocol data stream".
There is some information on this error at
https://rsync.samba.org/FAQ.html#1.
You can also find a list of error codes at
http://wpkg.org/Rsync_exit_codes.
We might be able to be of more help if you share the actual error messages you're seeing.
Regards,
Clifford