I am having same problem. I tried to upgrade to 3511, followed the steps with the USB pen drive and all went fine.
After reboot I get "BOOT ERROR" on the screen and thats it... I remembered I once had a similar problem and fixed it by reupgrading the DOM, but if boot again from the pen drive and try that with 3511 as soon as I hit on "Use Product Key from existing version" I get this:
Send the SN of the module and the error message and if you can the logs as well to support@open-e.com so we can guide you from there. We will have to generate the product key for you.
Was there a resolution for this?
This has just happened to us for a system ready to ship.
I debated whether to leave it at 3276 or upgrade it to 3518 - obviously I made the wrong choice!
Hardware is Intel SSR212MC2 (McKay Creek).
It sounds like the only option now is to overwrite the product key and obtain a new key?
I will do as per previous person & send details to support.
Thanks