Problem updating to to 4.2 thru OTA Android Robot exclamation

I do not know what is the problem of my device but I have encountered this issue and still

persistent. I have unlocked Galaxy Nexus bought from Play store. I got the notification that the

4.2 is ready to install but this what happened to me during the installation process, i got the

android robot with the exclamation mark. I reset my device and wiped everything and try to

install the OTA and I still get the same error. Is there a problem with my GN ?