Canon EOS M200 Advanced User's Manual page 383

With a Wi-Fi connection to a Web service established, a picture cannot be
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taken even if the camera's shutter button is pressed.
When sending an image to a Web service other than CANON iMAGE
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GATEWAY, a send error message may not be displayed even if the image has
not been sent to the Web service successfully. Since such send errors can be
checked on the CANON iMAGE GATEWAY site, check the error content, then
try sending the image again.
Depending on the Web service, the type or number of images that can be sent
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and the length of movies will be limited.
Certain images may not be able to be sent with [Send range], [Send all card],
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or [Send all found].
When you reduce the image size, all images to be sent at the same time are
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resized. Note that movies or b size still photos are not reduced.
[Reduced] is enabled only for still photos shot with cameras of the same model
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as this camera. Still photos shot with other models are sent without resizing.
When accessing CANON iMAGE GATEWAY, you can check the send history
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for the Web services that the images were sent to.
When you use a battery to power the camera, make sure it is fully charged.
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Sending Images to a Web Service
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