I generate a SpreadsheetML file for MS Excel in my C# project. This worked since some changes yesterday. Now I have issues opening it. It comes up with the error:
XML PARSE ERROR: Null or missing attribute value Error occurs at or below this element stack:
I already narrowed it down to a single table with the issue, but it has 7000+ rows with around 20 columns. When I export a single line it opens fine, so apparently not every line has the issue.
Now I'm looking for advice on how to find the issue as Excel does not provide a line number (I HATE that!).
Anybody knows a tool or good method to validate a SpreadsheetML file?
