Details also in the code, duplicated here: The bookViews element is not required according to the schema, but its absence can cause Excel to crash when opening the print preview (see https://phpexcel.codeplex.com/workitem/2935). It suffices however to define a bookViews with a single empty workbookView element (the bookViews must contain at least one wookbookView).
qrilka
commented
8 years ago
Details also in the code, duplicated here: The
bookViewselement is not required according to the schema, but its absence can cause Excel to crash when opening the print preview (see https://phpexcel.codeplex.com/workitem/2935). It suffices however to define abookViewswith a single emptyworkbookViewelement (thebookViewsmust contain at least onewookbookView).