error 70032

I got this one when I went to play a dvd today. I think I got it twice, but I didn't pay any attention the first time. Here's what happened:

I had changed the region code to play a region 2 dvd, this was a while ago

Today I put in a region 4 dvd, and it wouldn't play, and didn't give me the change region option. Dvd player then spat the dummy and gave me an error, which I stupidly didn't pay any attention to.

I took the disc out, put it back in, and it played, without me needing to change the code.

I finished with that one, and put another in. It opened dvd player and then gave me error 70032. I looked it up, couldn't find it anywhere.

Took the disc out, put it back in, and voila it let me change region code.

Now I'm not sure what it will do when I try the next dvd. (Looking for little bits for a talk, hence my choppping and changing).

Any ideas what this is about?