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Best Fixes to 'Excel Cannot Open the File Error Because the File Format or File Extension Is Not Valid'
![Error: "Invalid variant operation" when doing an Export Dataset activity to an Excel Instance (4318189) Error: "Invalid variant operation" when doing an Export Dataset activity to an Excel Instance (4318189)](https://prod-support-images-cfm.s3.amazonaws.com/KB_1-3TQPDYI_3987772%20Error%20Message%20(4).png)
Error: "Invalid variant operation" when doing an Export Dataset activity to an Excel Instance (4318189)
Expression: ("Invalid file open mode", 0) debug assert is occured in Visual Studio 2015 · Issue #2380 · tesseract-ocr/tesseract · GitHub
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LeadTools v20 HTML5 Document Viewer throws invalid file format error with Asp.Net Core backed Document Service Library in development mode - Stack Overflow
ValueError: invalid mode: 'rU' while trying to load binding.gyp (Python 3.9 compatibility issue) · Issue #2219 · nodejs/node-gyp · GitHub
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