XLSX and ODS no-worky!!

Got conversion errors for both Excel XLSX and LibreOffice ODS files. Not sure why it didnt work. This is on an iPhone 5s with IOS 7.1.1.

**December 2014**
Tried the new 4.3 version and still getting various conversion errors. I appreciate that youre giving the app for free, thanks! However, the app doesnt work and has never worked for me.

"Create a Nickname" about OOReader