Powershot D20 Error 20 What does this mean? How can I fix it?

[benosprey]

I have a Powershot D20 which is a remarkable camera, my best travel partner ever.  

Yesterday after being on the beach the screen showed a message like this  " Please reset the camera. E20. The device will turn off"   

I inmediately removed the battery in order to avoid any problems. 

How can I fix that? Is it serious? 

How can I reset the camera? only removing the battery? 

Please help!

Ben

Caracas, Venezuela.