FZ1000 strange error message

In the middle of a couple of photo sessions recently I got the following error message in big red letters across my EVF: "TURN THE CAMERA OFF AND THEN ON AGAIN".

I can't remember what my exact settings were but certainly nothing unusual and I can't find anything in the manual about this.

Ideas please?

OK, I finally found this answer on the Panasonic web site. Although I don't think this is what caused the message, it's possible, so I'll check in future that I'm not gripping the extended lens.

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Troubleshooting - Message "Please turn camera off and then on again"

This is displayed when the lens has stopped operating normally due to being pressed on by a hand etc.

Turn the camera on again. (Consult the dealer or an authorized Service Center if display still remains.)
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I had that happen to me.. Turning on and off worked though