How To Fix TWRP Error 7 Without a PC (While Flashing ROM)

With Android’s open-source nature you can try many new things like unlocking the bootloader on the device which in itself opens the gate to many other fixes. It includes the ability to install custom recovery like TWRP, flashing modules and frameworks and getting administrative privileges in the form of the root. This tutorial shows you how to fix TWRP Error 7 without needing a PC that you may experience while flashing a custom ROM such as LineageOS.

Now, to carry out customizations you need to have a custom recovery like TWRP. This is not free of errors and bugs. Earlier when it had a competition with CWM it had some bugs. For now, it has become a beast and the only custom recovery in the market. Other modified recoveries you see across the net are based on this but there are few issues that users are facing. If you are facing such an issue then follow through.

Fixing TWRP Error 7 – What you need to know

What is TWRP Error 7

While flashing a custom ROM you may have faced an error on the device, it is caused when ROM’s updater script file checks to see if the mobile device is compatible with it we are installing known as “asserts”. This is a safety mechanism that keeps a check that we do not install any incompatible version because if we do we might end up with a bricked device.

Though this mechanism in an important component many users are facing this error as they flash the correct build. If you are getting a custom OS on the device then you shall not be facing this issue in the first place, still, if you are then do not worry.

Pre-requisites that you need to have:

#1: Any unzip software like 7Zip, WinZip and others.

#2: Text editor software like notepad++ we suggest that you do not use windows default notepad application.

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How To Fix TWRP Error 7 (4 Working Ways)

Extract your ROM

ROM Extraction

Extract custom ROM which gives out this error to the system.

Rename the ROM file

  • Go to META-INF folder > com >> google >> android.
  • In here you would find 2 files; update binary and updater-script. Rename later to updater-script.txt.

ROM File Rename

Open the .txt file

Next right-click on “updater-script.txt file and choose “open with”. From the menu choose “notepad++ application”.

Editing Updater Script

Edit the “updater-script”

You need to delete lines starting from the word “assert” to the next semi-colon. This portion is usually on the top.

Remove Assert

Once removed highlighted text, the first line should now begin from the “mount” word.

Mount ROM

Save and rename

Once the mentioned section has been deleted from the file, save it, once done rename “updater-script.txt” back to “updater-script”.

ALSO CHECK: Nexus 5X Won’t Boot Past Google Logo [Fix].


Re-compress files as shown below:


Flashing the ROM

Once ROM has been re-compressed, transfer it to your device and try flashing again. Now you would not face TWRP error.

To flash TWRP there are many things you need to enable on the phone

Unlocking the hidden developer option

For this go to settings > about phone > more, choose “build number” 7 times. These shall now appear on the settings screen.

Make sure USB Debugging is enabled

For this go to settings > developer options, check the “enable unlocking” box.

Install ADB and fastboot on system

Next get these as with this you can control your phone through a command prompt or terminal and sideload software onto it.

The best way is to get SDK platform-tools from the android developer’s site. Download tools, extract to a folder (we go with “C:\adb”)

Connect the phone to the system through a USB cable. Be sure to its mode is set to “transfer files” or “transfer media”.

ALSO CHECK: ADB Fastboot Commands (Latest List) PDF.

Reboot bootloader

Go to TWRP devices web page on phone, type its model into the box, on next page do to download links, pick mirror and get latest TWRP image file to the system.

Next open command prompt as administrator, use “cd” command to change the default directory to where platform-tools were extracted (for us command is cd\adb\)

Next enter:

Adb reboot bootloader

This shall reboot the connected phone to it.

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In here, it is crucial that at top of the screen it says “unlocked”. This indicates that it is unlocked and you can continue with flashing TWRP.

If it is locked, you shall need to follow the phone’s OEM’s instructions to unlock it. HTC, Sony and Motorola have tools on their sites that guide throughout the process.

TWRP Recovery Installation FAQ

Method #1: Installing TWRP Recovery

Assuming the bootloader is unlocked, once the phone is in recovery mode use the volume button to scroll to download mode, hit the power button to select it.

Once in this mode, enter the following command on the system:

Fastboot flash recovery twrp-version.img

Replace twrp-versionwith the same file name of .img that you downloaded.

Press enter to install it into your phone.

To open this, click “reboot to recovery in a bootloader”. To access it and the bootloader in future, turn off the phone and hold the volume down and power buttons till the bootloader loads.

ALSO CHECK: Android WebView Crashing Fix [Easy Tutorial].

Method #2: Installing SuperSU with TWRP

When it opens, it shall ask if you want to “keep system read-only”. Answer in “no” as this would prevent installing custom ROM and making use of its features.

Tick box which says “never show you this screen again”, swipe across the bottom of the screen.

On the system download its latest version and save it to the device.

Back to TWRP’s main menu, click install, and go to SuperSU zip file download, click in and then swipe to confirm flash.

The rooting process shall now begin; it shall take about a minute. Once completed, click “wipe cache/Dalvik” then reboot the system.

Final Statement: Yay, TWRP Error 7 should now be fixed!

We all love Android for one reason and that is customization! However, there can be many issues that can arise while you are flashing custom ROMs such as lineageOS. Our article has shared the methods on TWRP Error 7 fix without requiring a PC.

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