I have dm900 and have just tried to update image and failed miserably. I have japhar sim installed and this is what I get on the log.
The image is:
openpli-enigma2-7.1Star-dm900_Japhar_v6_GStreamer_1.17.0.1_20190921.rootfs.tar

[*] Mounting '/dev/mmcblk0p2' to '/mnt'
[*] Extracting '/tmp/A4pQUe' to '/mnt'
[*] Mounting '/dev' to '/mnt/dev'
[*] Mounting '/proc' to '/mnt/proc'
[*] Mounting '/run' to '/mnt/run'
[*] Mounting '/sys' to '/mnt/sys'
[*] Mounting '/tmp' to '/mnt/tmp'
Warning: Could not read CA!
Warning: Please consider updating your rescue loader!
/usr/sbin/flash-kernel: line 100: stat: not found
sh: bad number
Fatal: Kernel image is too big
Fatal: Failed to run kernel-image.postinst
[*] Unmounting '/mnt/tmp'
[*] Unmounting '/mnt/sys'
[*] Unmounting '/mnt/run'
[*] Unmounting '/mnt/proc'
[*] Unmounting '/mnt/dev'
[*] Unmounting '/mnt'

What am I doing wrong?

The logs looks ok, boot the box and check the image information to see the release date that should be the 21st september.

Admin

Thanks Carpal that did the trick, the message threw me a little by saying Fatal lol. Thanks again