: Ensure you are using the latest version of your repair software. Most tools like UnlockTool have a "Check for Updates" button or require you to download the newest setup from their official site.
This is the most common cause. It occurs when a user attempts to flash an IPSW (iPhone Software) file that does not match the device's hardware ID. If a restore script seeks the d101ap loader within a firmware bundle intended for a different iPhone 7 variant (like the d10ap ), the process will terminate. Loader For Iphone9 3-d101ap Not Found