[Xperia Z1 Compact Original Android Development] €D.:
Can't confirm that solution!

When I try to inject boot sector before installing multirom.zip I get: FAIL

I:operation_start: 'Injecting'
Extracting boot image...
rm: can't remove '/tmp/boot': No such file or directory
Decompressing ramdisk...
Ramdisk uses LZMA compression
38053 blocks
Copying trampoline...
I:Running cmd "cp "/data/media/0/multirom/trampoline" /tmp/boot/rd/init"
I:Running cmd "cp "/data/media/0/multirom/mrom.fstab" /tmp/boot/rd/mrom.fstab"
Compressing ramdisk...
[B]Recovery can't compress ramdisk using LZMA![/B]
I:Set page: 'action_complete'
I:operation_end - status=1

Still I get ERROR: 7 by installing the MultiROM.zip then - what a surprise...:

I:operation_start: 'Flashing'
Installing zip file '/external_sd/AAA/MultiROM/MultiROM-v30x-170115-UNOFFICIAL-amami.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.
Installing MultiROM for amami
Extracting binaries...
about to run program [/sbin/busybox] with 3 args
mount: mounting /dev/block/mmcblk0p25 on /data failed: Device or resource busy
run_program: child exited with status 255
about to run program [/sbin/busybox] with 3 args
minzip: Extracted 49 file(s)
minzip: Extracted 6 file(s)
about to run program [/tmp/extract_multirom.sh] with 1 args
rm: can't remove '/data/media/0/multirom/boot.img-ubuntu*': No such file or directory
rm: can't remove '/data/media/0/multirom/infos/*': No such file or directory
about to run program [/tmp/inject_boot.sh] with 1 args
Injecting boot image...
40960+0 records in
40960+0 records out
20971520 bytes (20.0MB) copied, 0.354606 seconds, 56.4MB/s
writing boot image config in /tmp/bootimg.cfg
extracting kernel in /tmp/zImage
extracting ramdisk in /tmp/initrd.img
extracting DTB in /tmp/dtb.img
/tmp/inject_boot.sh: line 46: /tmp/multirom/lzma: Permission denied
Failed to extract ramdisk!
run_program: child exited with status 1
script aborted: assert failed: run_program("/tmp/inject_boot.sh") == 0
assert failed: run_program("/tmp/inject_boot.sh") == 0
Updater process ended with [B]ERROR: 7[/B]
I:Legacy property environment disabled.
Error installing zip file '/external_sd/AAA/MultiROM/MultiROM-v30x-170115-UNOFFICIAL-amami.zip'
Updating partition details...
I:Data backup size is 2362MB, free: 8500MB.
I:Unable to mount '/usb-otg'
I:Actual block device: '', current file system: 'vfat'
...done
I:Set page: 'flash_done'
I:operation_end - status=1

I am on DStriker SP008 with advanced Kernel v19 and real recovery.

However, that TWRP-3.0.2 is the only one I can flash and use with .236-Firmwares (eg MX ROM - not working neighter) or the newest cm12 including the current security patch.

Anlalysing the logs my nooby me has the suspision that the real recovery is the problem, somehow.. Seems like LZMA does not work as expected..

Maybe we just need a new TWRP with multirom support - sadly I have absolutely no idea how to compile one from source nor if that would actually solve the problem.. :confused:

Maybe someone with an up2date and working configuration could tell us how to proceed.

And maybe the OP could be updated then, to prevent confusion ;)