Spreadsheet can't be opened

I'm having the same problem but I was using Numbers in my Mac not an iPad....

Hello,

I have the same problem after I have updated to iOS 6.1, my ipad2 is still in warranty, therefore I asked apple how to solve.

The file I have problem now remain in the Nov14 2012 version in my ipad2, but I have connect to iCloud everyday and everyday I have made the changes, Now My ipad2 said that I can't open the file and apple hotline told me there is an error between my ipad and the iCloud, but they don't know why I have this situation. They told me go to iCloud.com to find out, after that my file is disappear in iCloud, I don't know how to do? Is there any ways to solve my problem?

Before I update to 6.1, after 6.0.1, all the files in my number has a problem about update, the version in the file has remain in one weeks before, all the changes has gone. I can't Image now I have a serious problem than before.