Flashing recovery image failed on Shield

I tried to flash the Update 63 image to Shield(OTA Update 64) in order to use the Perfhud ES(of TADP 2.0r6).
Recovery.img and boot.img are flashed successfully.
But flashing system.img never finish.

fastboot doesn’t proceed after printing “sending sparse ‘system’ …”.

I fixed it. I’m not sure what reason is. Locking and unlocking bootloader fixed this issue. :-)

glad to hear you have fixed it. if there any issue, please let us know to help you.

You have to lock and unlock your bootloader to totally clear all portion data or it will keep your cookies

For the shield k1 what’s the highest opengles you get 3.1 or 4.1?

You have to lock and unlock your bootloader to totally clear all portion data or it will save your cookies