Android 4.2 Nexus 7 Update "Assert failed: apply_patch_check()"
Q- What is an assert script?

A- All it does is check to make sure you are flashing the ROM on the correct device.

How to fix Android Custom ROM Status 7 installation Abort assert failed error in Recovery Easily [Ultimate Guide]:
http://mobotechie.com/tips-tricks/how-to-fix-android-custom-rom-status-7-installation-abort-assert-failed-error-in-recovery-easily-ultimate-guide


Assert failed [SOLVED]:
http://forums.androidcentral.com/optimus-v-rooting-roms-hacks/182438-solved-assert-failed.html


Thanks for those cool guys, and good luck.