[Motorola Droid 4] K_Meleon:
Hi Michael!

Sorry! I wasn't able to access the error log, otherwise I would have uploaded it before. Now I have access to it. You can see the "error" I was referring to underlined:

1.

Installing '/sdcard-ext/Firmware/LineageOS/lineage-migration-signed.zip'...
Checking for MD5 file...
Skipping MD5 check: no MD5 file found
I:Zip does not contain SELinux file_contexts file in its root.
I:Legacy property environment initialized.
[U]ERROR: packages.xml not found. Exiting...[/U]
I:Legacy property environment disabled.
Updating partition details...
I:Updating /etc/fstab...I:Fstab: Adding /dev/block/mmcblk1p25 /sdcard vfat rw
I:Fstab: Adding /dev/block/mmcblk0p1 /sdcard-ext vfat rw
I:Fstab: Adding /dev/block/mmcblk1p24-orig /data ext3 rw
I:Fstab: Adding /dev/block/mmcblk1p21-orig /cache ext3 rw
I:Fstab: Adding /dev/block/mmcblk1p20-orig /system ext3 rw
I:Fstab: Adding /dev/block/mmcblk1p20-orig /systemorig ext3 rw
I:Fstab: Adding /dev/block/mmcblk1p25 /ss vfat rw
I:Set page: 'flash_done'
I:Set page: 'clear_vars'
I:Set page: 'main2'
I:Set page: 'install'
I:Set page: 'flash_confirm'
I:Set page: 'flash_zip'
I:Set page: 'flash_zip'

2.

Installing '/sdcard-ext/Firmware/LineageOS/lineage-13.0-20170401-nightly-maserati-signed.zip'...
Checking for MD5 file...
Skipping MD5 check: no MD5 file found
Verifying zip signature...
I:read key e=3 hash=20
I:read key e=65537 hash=20
I:2 key(s) loaded from /res/keys
I:comment is 1455 bytes; signature 1437 bytes from end
I:failed to verify against key 0
I:i: 0, eocd_size: 1477, RSANUMBYTES: 256
I:failed to verify against key 1
I:i: 1, eocd_size: 1477, RSANUMBYTES: 256
E:failed to verify whole-file signature
[U]E:Zip signature verification failed: 1[/U]

3.

Installing '/sdcard-ext/Firmware/LineageOS/lineage-13.0-20170401-nightly-maserati-signed.zip'...
Checking for MD5 file...
Skipping MD5 check: no MD5 file found
I:Zip contains SELinux file_contexts file in its root. Extracting to /file_contexts
I:Legacy property environment initialized.
Target: verizon/maserati_vzw/cdma_maserati:6.0.1/MOB31K/20170401:user/release-keys
Target: verizon/maserati_vzw/cdma_maserati:6.0.1/MOB31K/20170401:user/release-keysdetected filesystem ext3 for /dev/block/system
detected filesystem ext3 for /dev/block/systemabout to run program [/tmp/install/bin/backuptool.sh] with 2 args
detected filesystem ext3 for /dev/block/userdata
detected filesystem ext3 for /dev/block/userdataabout to run program [/tmp/install/bin/otasigcheck.sh] with 1 args
[U]You have an installed system that isn't signed with this build's key, aborting...
run_program: child exited with status 124
script aborted: Can't install this package on top of incompatible data. Please try another package or run a factory reset[/U]
Can't install this package on top of incompatible data. Please try another package or run a factory reset
I:Legacy property environment disabled.
E:Error executing updater binary in zip '/sdcard-ext/Firmware/LineageOS/lineage-13.0-20170401-nightly-maserati-signed.zip'
Error flashing zip '/sdcard-ext/Firmware/LineageOS/lineage-13.0-20170401-nightly-maserati-signed.zip'

Is this last error related to the wrong filesystem of the data partition?

Well, I tried that first with a different LineageOS installation, but it wasn't working, so I tried another one (SuperSU). Thank you for providing a working version and thanks for your help!

---------- Post added at 03:53 PM ---------- Previous post was at 03:24 PM ----------

Oh, now I got it (at least I think so :eek: ):

The root cause of this issue is, that /data/system/packages.xml wasn't found. Your script seems to sign the partitions. It can't find the file because I didn't install gapps?! Might this be the problem? If yes, is there any solution?