Trouble updating

I have a razr maxx running 4.04 i am rooted and trying to update to 4.1.2 that was recently released but installing it fails everytime. I tried installing in recovery from ext-sd card and here is the "error" i get:

assert failed:apply_patch_check("/system/framework/co
re.odex", "3a97802ccb781e95090d0922375523e3bfb31dee",
"2c0a903711609db5e61a1cea08a9452428b40c33")
E:Error in /tmp/sideload/package.zip
(Status 7)
Installation aborted

I have tried factory reset but it did not work still. I need help

Sent from my DROID RAZR using xda premium