If you cannot scan, check the following.
Is the file name set at the device single-byte letters/numbers?
If you are scanning from an imageRUNNER ADVANCE using the [Scan and Send] function, and set a file name at the device that includes diacritical marks or certain symbols such as double-byte characters, umlauts, and/or accents, the data cannot be correctly received in this app and a transmission failure error message will be displayed at the device.
When specifying a file name at the device, enter a file name using single-byte roman characters or single-byte symbols (ASCII characters).
Is the resolution of the scanned data too high?
If you scan data with a high resolution setting, the operations of this app may become unstable. In order to stabilize operations, reduce the resolution when scanning.
Are the management settings of the device correct?
If [Management Settings] > [License/Other] > [MEAP Settings] > [Use SSL]/[Use TLS] is set to [On] in an imageRUNNER ADVANCE device and the version of certificate used is "X.509v1", you may not be able to configure scan settings on a mobile terminal even for devices that support [Scan for Mobile] or devices with the Canon Mobile Scanning MEAP Application installed.
Set [Use SSL]/[Use TLS] to [Off] or change the device authentication version to “X.509v3” or later. For details, check with the device administrator.
Are the network settings of the device correct?
If you set [On] for [Preferences] > [Network] > [TCP/IP Settings] > [Proxy Settings] at the imageRUNNER ADVANCE device, scanning may not operate correctly. In such a case, set [Off] for it and rescan.