Hi, I think it is the same issue: We were able to upgrade from 3.1.4 to 4.0.1 (the base image) succesfull without any problems, We then tried to upgrade from 4.0.1 to 4.0.4 but it failed with "invalid image" message We tried to upgrade from 4.0.1 to 4.0.3 -> succesfull We tried again to upgrade from 4.0.3 to 4.0.4, again failed with "invalid image" message The message invalid image appears when uploading the file to the device, not when trying to install it, so it seems there is some kind of checksum in the image that is not processed correctly. Kind regards, Hen
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