If your computer doesn’t "hand off" the connection to the ramdisk properly, the flash will fail. Open 3uTools. Go to the tab. Click on iTunes Utility .

To understand why this error is critical, you must first understand the concept of a ramdisk in the context of iOS restoration.

Try toggling between and Anti-Recovery Flash (note: Anti-Recovery will wipe all data permanently). 5. Change the Connection Mode

Before proceeding, ensure you have:

The error in 3uTools typically occurs when trying to flash or restore an iOS device (especially in recovery or DFU mode). It means 3uTools cannot load the temporary boot system needed to communicate with the iPhone/iPad during the restore process.