Yeah, I know this is an old thread
I know this thread's been idle for a while, but just wanted to post this in case anyone else has run across this problem.
I got this error while I was driving the other day, and just happened to be setting up an appt with my local BMW service. I took it in today, and they had to do a software update (no details on which software yet). It must be a big update, it is apparently going to run all night, and I'll get the car back tomorrow.
I'm not sure if this is an iDrive update. I had them check the version on it a couple weeks back (I've only had the car for a month), and they said iDrive was up to date. I'll post back tomorrow when I find out what the problem was.