Canon EOS-1D X Mark II G Instruction Manual page 99

73: Could not synchronize the time
Are you following the correct procedure to establish a

connection between the master and slave cameras?
Operate the master and slave cameras by following the correct

instructions (p.68-70).
Is the master camera too far from the slave cameras?

Bring the master and slave cameras closer together.

81: Wired LAN connection lost
Is the LAN cable securely connected?

Reconnect the LAN cable between the camera and server.

Because the cable may be severed, try using another cable to
connect the devices.
Is the hub or router on?

 Turn on the hub or router.
Is the power of the FTP server on?

 Turn on the FTP server. The server may have been turned off
because of an energy-saving mode.
91: Other error
A problem other than error code number 11 to 81 occurred.

Turn off and on the camera's power switch.

Responding to Error Messages
99