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?
SpreadsheetML - Errors and Validation
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