export xls

Same issue here, I am using Numbers 3.5.2

I've also had an issue opening xls exports in libre office calc 4.2.7.2. I get a "General Error.
General input/output error" dialog and the export does not display. I had a poke around in the xls file (which is just xml) in a text editor and found in my export the following types of Cell elements were causing the problem:

<Cell ss:Index='2' ss:StyleID=&#x27;story-color-0&#x27;>

I did a search and replace in the file, replacing &#x27; with ' so that you get:

<Cell ss:Index='2' ss:StyleID='story-color-0'>

I could then open and view the file in libre office. Looks like an encoding issue with the export function.

Also noticed that some of the text was not rendering. The solution to this was to find and replace all the font tags.
Find

<Font html:Color="#999999" xmlns="http://www.w3.org/TR/REC-html40">

and

</Font>

and replace with nothing. Not sure if this is a libre office limitation.

Unfortunately the platform is built in Ruby, and the only libraries we could find to export to Excel use this mock-Excel format which is actually XML under the hood. As such, non MS programs opening the Excel documents sometimes fail. We will see what we can do. Sorry for the inconvenience.