OTA Failed！Failed to Mcumgr DFU: Invalid header magic number

[spring.liu]

why can cause this  problem！ I'm not familiar with NCS OTA

[Einar Thorsrud]

Hi,

The error refers to the magic image number that is used in MCUboot (0x96f3b83d), and that is not found as expected in the image. Where does this .bin file come from? Are you sure it is a valid update image?

[spring.liu]

123.zip this is the program