Canon EOS 77D, Wi-Fi (Wireless Communication) Function Instruction Manual

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Responding to Error Messages
150

A problem other than error code number 121 to 126 occurred
during the connection to the Web service.
 Try re-establishing the Wi-Fi connection to the Web service.

Is the printer performing a printing process?
 Try again to establish the Wi-Fi connection to the printer after the
printing process is finished.

Is another camera connected to the printer via Wi-Fi?
 Try again to establish the Wi-Fi connection to the printer after the
Wi-Fi connection to the other camera has been terminated.

Is the power of the printer on?
 Try again to establish the Wi-Fi connection after turning on the
printer.
127: An error has occurred
141: Printer is busy. Try connecting again.
142: Could not acquire printer information. Reconnect to
try again.