Fastboot Android-product-out Not Set Best -

When you compile the Android Open Source Project (AOSP) or any custom ROM from source, the build system generates a multitude of files, including the crucial system.img , boot.img , vendor.img , and others. These files are output to a specific directory on your machine.

Instead of:

export ANDROID_PRODUCT_OUT="/absolute/path/to/your/out/target/product/device_codename" fastboot android-product-out not set

fastboot flash boot /path/to/your/out/target/product/device/boot.img fastboot flash system /path/to/your/out/target/product/device/system.img fastboot flash vendor /path/to/your/out/target/product/device/vendor.img This method is tedious if you are flashing a full system image, but it is foolproof because it does not rely on environment variables being set correctly. When you compile the Android Open Source Project

Instead of using the convenient fastboot flashall command (which relies on the variable to find all images), manually flash individual images by providing their full path. Instead of using the convenient fastboot flashall command

When you run a command like fastboot flashall or fastboot update , the tool checks the ANDROID_PRODUCT_OUT variable. If this variable is empty or pointing to the wrong directory, Fastboot cannot locate the image files, resulting in the error. Prerequisites: The "Lunch" Factor Before diving into manual fixes, it is crucial to ensure you have properly "lunched" your build.