I am having the same problem with my PowerShot A2200. The battery is fully charged, but my lens will not open, displaying "lens error".
Nothing is blocking the lens - and I had no problems leading up to this. Camera hasn't been dropped either.
Camera will display typical "warm up" Canon screen, but nothing else - other than stating Lens Error - will restart automatically.
Camera is 13 months old. Perfect until now!
Please remove the battery or batteries from the camera for a few moments, then try again. If the lens still does not extend and an error is displayed, the camera will require service.
To start your repair process, you'll need to complete a Repair Request on our website.
If this is a time sensitive-matter, additional support options are available at Contact Us.