A friend of mine just bought an MBA. He installed Office 2011 in order to work mainly with Excel. As he opened one of his file (6.5MB - multiple sheets - company logo - no graphs) and wanted to save it this box appears:
where you can read something like
Not enough memory. If I click on OK the box appears again like 15 times.
Thinking of an installation issue, I tried on my MBP which did the same result. But his old computer (win7 - Excel 2013) can open and save the file without any issue.
During my google searches, the only result that I found led me to a Windows based solution or an help site from 1994...