iPad Pages An error has occurred and Pages must close

When I try to open a document in Pages on my iPad, I gets the error message "An error has occurred and Pages must close". The document was created natively in pages, and has 23 page with lots of tables and screen captures. Now I can not open it or send it to iTunes. But I try to send another document file to iTunes, it works.After pages app updated to 1.3.1, it doesn't fix the problem. How to