The “Invalid Encryption Method” error is almost always a version mismatch. A firmware update usually erases the problem. If you can’t update, send the file unencrypted—your printer doesn’t truly need encryption for most daily tasks.
Enable syslog forwarding: ! U1 setvar "syslog.ip_address" "192.168.1.100" (your logging server IP) ! U1 setvar "syslog.port" "514" ! U1 setvar "syslog.log_level" "4" zebra software invalid encryption method