Canon EOS REBEL T7I Wi-Fi (Wireless Communication) Function Instruction Manual page 147

102: Could not send files
Does the card in the camera to receive data have sufficient

space?
Check the card in the camera to receive data. Replace the card or

make sufficient space available, then try sending the data again.
Is the card in the camera to receive data locked?

Check the card in the camera to receive data. Release the lock,

then try sending the data again.
Check if the folder number of the camera to receive data is

999 and the file number 9999.
Folder or file names cannot be created automatically. Replace the

card in the camera to receive data, then try sending the data again.
Is the card working properly?

Replace the card in the camera to receive data, then try sending

the data again.
Is the camera to receive data compatible with playback of

MP4-format movies?
When the camera to receive data is not compatible with playback

of MP4-format movies, they cannot be sent to the camera.
103: Could not receive files
Is the camera to receive data ready to receive data?

Check the battery and communication status of the camera to

receive data, then try sending the data again.
104: Could not receive files. Card full
Does the card in the camera to receive data have sufficient

space?
Check the card in the camera to receive data. Replace the card or

make sufficient space available, then try sending the data again.
Responding to Error Messages
147