Can't install TWRP - Xperia Tablet Z Q&A, Help & Troubleshooting

Hi,
there is something wrong with my Xperia Tablet Z. After upgrading from CyanogenMod 11 to CyanogenMod 12 a few Mouth ago the Custom Recovery i've installed before was replaced with CyanogenMod-Recovery. Because CM doesn't work very well i downgraded to Stock-ROM using Flashtool. Because i couldn't find a Way to root Firmware 4.2.x and higher i downgraded to 4.1.2 and rooted with towelroot. The Bootloader is unlocked (checked with *#*#7378423#*#*).
But when i try to install TWRP it failed. This is the error with Fastboot
Code:
fastboot flash recovery twrp.img
fastboot flash recovery twrp.img
sending 'recovery' (10688 KB)...
OKAY [ 0.359s]
writing 'recovery'...
FAILED (remote: Command not allowed)
finished. total time: 0.359s
All drivers are installed. I've tried this on Ubuntu 16.04 and Windows 7 with installed Flashtool and also with installed ADB Installer (https://forum.xda-developers.com/showthread.php?p=48915118#post48915118). I tried it with three usb cables and different usb ports.
It also doesn't work with TWRP Manager (https://play.google.com/store/apps/details?id=com.jmz.soft.twrpmanager&hl=de) and the Official TWRP App (https://play.google.com/store/apps/details?id=me.twrp.twrpapp&hl=de). TWRP Manager show me this error
Code:
Flashing recovery was unsuccessful. Either you already have thos recovery installed or another error has occuured. Would you like to attempt to recovery now?
When i try to reboot the App freeze.
The Official TWRP App seems to install the recovery ("was successfully installed"), but i can't reboot into recovery with VOL+ (also tried VOL-). The Table starts normally.
Maybe there is something wrong with my Tablet now? Is there any other Way to flash a Recovery or to flash a Custom-Rom or a pre-rooted Stock-Rom? As i said before i can't root it with a Firmware higher 4.1.x. Update with the internal Update fuction also failed. So at the moment i can use [email protected] or a higher Version without root.

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@PiereMallao
Sony devices, in particular, tabz don't have separate recovery partition. So you need to flash kernel with built-in recovery (see crDroid, RR, LA firmware threads), or you have to flash TWRP to FOTA partition.

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Hi,
after some years with my pollux_windy left untouched, I decided I'd install my first custom ROM. But I'm having serious trouble to do so, and it seems unsolvable to me after hours of despair (I've been trying for almost 10 hours now).
I was on Lollipop (firmware .222), first unlocked my bootloader, then rooted my tablet (using kingroot). Then I tried to install twrp, and the only way I managed to do this was through this "TabZ-lockeddualrecovery2.8.26" thing. Only, I couldn't manage to flash anything, ended up bricking my tablet.
I then flashed a stock 5.0.2 ROM (.454), retried installing twrp via the same method, and although I manage to access twrp, I get the same error each time I want to flash a new ROM (tried CM/LineageOS 14.1 and ResurrectionRemix v5.7.0), which is : "E: error executing updater binary in zip [insert name of the .zip]".
If I hear Rootk1t correctly, I should flash a kernel with a built-in recovery first... But, doing some research, it looks like you need a working recovery in the first place to flash a custom kernel.
I'm completely lost in this... How can I get that damn recovery to work, and/or get a custom ROM ?
Edit : Alright, with a good 3 hours-long night and a lucky shot, I managed to install LineageOS ! I used twrp recovery (from the dualrecovery thingy-thing) to wipe clean the device, then tried to install the ROM. It gave me the same error message about updating binary. So I rebooted the device into fastboot (couldn't access the recovery anyway... not sure if it's normal), flashed the "boot.img" from the ROM using Flashtool, then rebooted again the device. On the bootlogo, I tried to enter recovery with Vol-, and it worked. i then flashed with ease the ROM. Maybe it will help somebody !

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Hapaxx said:
If I hear Rootk1t correctly, I should flash a kernel with a built-in recovery first... But, doing some research, it looks like you need a working recovery in the first place to flash a custom kernel.
Click to expand...
Click to collapse
yep, one just need to
fastboot flash boot boot.img
Click to expand...
Click to collapse
enter recovery and flash firmware zip, gapps, etc from it.

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Root works now, but i can't install TWRP 3.0.2.0 (but XZDualRecovery works).
Sony devices, in particular, tabz don't have separate recovery partition. So you need to flash kernel with built-in recovery (see crDroid, RR, LA firmware threads), or you have to flash TWRP to FOTA partition.
Click to expand...
Click to collapse
Hapaxx said:
So I rebooted the device into fastboot (...), flashed the "boot.img" from the ROM using Flashtool, then rebooted again the device.
Click to expand...
Click to collapse
If i understand correct Hapaxx flashed the boot.img form the LineageOS 14.1 Image? I don't want to install a Custom-ROM. crDroid is for Nexus. Where can i download a Kernel with build-in Recovery for tabz? or can i use the same crDroid also for tabz?
how can i flash the recovery to fota? can i do this with the same *.img or do i need an other image?

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i just unlocked my bootloader and i dont know what else to do, i would like to install lineage 14.1 but i dont know what path to follow, i also hit the whole command not allowed thing, and what Hapaxx said, i'm unable to understand, could someone give a clear set of commands to follow? please? what to do in order so i dont brick my tablet.

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Hi PiereMallao,
i have the same Odyssey behind me! Sony Xperia Tablet Z SGP321 LTE (16GB)
1. First check Bootloader unlocked with Flashtools 0.9.18.6. Check!
2. Install SGP321_10.1.1.A.1.307_Unbranded.ftf with Flashtools 0.9.18.6. Check!
3. Developertools on. USB-Debugging on. unknown sources on. Check!
4. Root with Doomlord_Rootkit_v18.rar. Check!
5. Check with App "Root-Checker" in Google PlayStore. Check!
6. And now I try to install TWRP for 3 days !
First try with TabZ-lockeddualrecovery2.8.26-RELEASE.combined.zip its ok, but i come only once after the installation in the recovery mode. Afterwards I have it with Vol+ or Vol- tried. It always starts the normal system.
7. With Fastboot -
Code:
fastboot flash recovery twrp.img
fastboot flash recovery twrp.img
target didn't report max-download-size
OKAY [ 0.359s]
writing 'recovery'...
FAILED (remote: Command not allowed)
finished. total time: 0.359s
How can i check Bootloader unlock ? In Android Tablet Z i didnt have a keyboard to put in the hex-code *#*#7378423#*#* ?
In Flashtools i checked Bootloader unlock so i have no idea at this Point.
What can I do ?

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sorry, i have so solution for this problem. i have given up. theonly way i know to ceck the bl is unlocked or not is flashtool.

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I'm having issues with this as well. Trying to install LineageOS 14.1, I can initially get twrp onto the tablet, flash LineageOS 14.1.. boot into it, set up (it is recommended to reboot the tablet once before flashing gapps) ...however, rebooting wipes twrp out. I'm not used to this FOTA thing (first i've ever heard of it) so not sure how to get twrp to 'stick' and not get wiped out

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I got it installed this weekend. First secret was fastboot TWRP to boot, not recovery:
Fastboot flash boot twrp-------.img
Make sure you have the right TWRP image.
Then boot into recovery and TWRP comes up.
Flash lineage and gapps.
See:
https://forum.xda-developers.com/xp...de-tutorial-sony-xperia-tablet-z-lte-t3392831

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bowguy said:
I got it installed this weekend.
Click to expand...
Click to collapse
I'm a little confused about part 14.
Download app from Play Store : Recovery Manager for Xperia. (done)
Chose FOTAkernel -> Backup. (this makes the app unresponsive for me so i skipped it for now)
Then TWRP -> Download. (done)
then the rest of the steps are confusing. b/c following that guide twrp is already on there (flashed via fastboot), and so why am i replacing the fastboot flashed twrp with the twrp just downloaded in the above step?
and what does the fotakernel have to do with all this? am i suppose to replace the fotakernel with the twrp image downloaded above?
the steps in that guide need more detailed elaboration

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x000x said:
I'm a little confused about part 14.
Download app from Play Store : Recovery Manager for Xperia. (done)
Chose FOTAkernel -> Backup. (this makes the app unresponsive for me so i skipped it for now)
Then TWRP -> Download. (done)
then the rest of the steps are confusing. b/c following that guide twrp is already on there (flashed via fastboot), and so why am i replacing the fastboot flashed twrp with the twrp just downloaded in the above step?
and what does the fotakernel have to do with all this? am i suppose to replace the fotakernel with the twrp image downloaded above?
the steps in that guide need more detailed elaboration
Click to expand...
Click to collapse
I never did step 14. Looks straight forward. You should ask this question on that thread

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bowguy said:
I never did step 14. Looks straight forward. You should ask this question on that thread
Click to expand...
Click to collapse
Have you rebooted and tried to get back into twrp after you installed the rom? I did the first few steps of the guide a few days back, but every time after flashing the rom it would wipe twrp. I think the only way to get twrp to 'stick' permanently is to complete all the steps

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x000x said:
Have you rebooted and tried to get back into twrp after you installed the rom? I did the first few steps of the guide a few days back, but every time after flashing the rom it would wipe twrp. I think the only way to get twrp to 'stick' permanently is to complete all the steps
Click to expand...
Click to collapse
After installing twrp via fastboot per the directions, then reboot into recovery I had few problems. The only issues I had are solved by installing the ROM first - not gapps. Boot and run setup. Then boot recovery and install gapps.
I never had issues with twrp after installing. Power off, power on and rock volume up/volume down until you are in recovery

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bowguy said:
After installing twrp via fastboot per the directions, then reboot into recovery I had few problems. The only issues I had are solved by installing the ROM first - not gapps. Boot and run setup. Then boot recovery and install gapps.
I never had issues with twrp after installing. Power off, power on and rock volume up/volume down until you are in recovery
Click to expand...
Click to collapse
Are you using twrp-3.0.2-0-pollux_windy?

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x000x said:
Are you using twrp-3.0.2-0-pollux_windy?
Click to expand...
Click to collapse
Yes.
I never bothered with step 14 in the guide. It works fine as is.
P.S.
As per my post on the guide referenced, I installed Rashr and flashed TWRP that way. Seemed to work perfectly. TWRP now shows 3.0.2 which is correct version. No change to system boot. Nice app

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Rootk1t said:
@PiereMallao
Sony devices, in particular, tabz don't have separate recovery partition. So you need to flash kernel with built-in recovery (see crDroid, RR, LA firmware threads), or you have to flash TWRP to FOTA partition.
Click to expand...
Click to collapse
Bro please give me link to twrp latest for sgp321 m going to unlock bootloader using" flash tool" is it ok
Please tell me how to flash recovary too
Is it ok if i root my tab after unlocking bootloader using king root ajnd flash using flashify
Is ressuraction remex stableto use tell me bugs
?

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i had equal problem
FAILED (remote: Command not allowed)
i also have the same problem with my huawei chc u23 gplay mini bricked no recovery please help