Only it seemingly wasn't an "Excel error", but rather an error with some unknown software that used/filled/whatever a .xls file going above/beyond the format sp

Only it seemingly wasn't an "Excel error", but rather an error with some unknown software that used/filled/whatever a .xls file going above/beyond the format specifications limits. https://news.ycombinator.com/item?id=24721585 https://news.ycombinator.com/item?id=24721585