Very recently, I think since upgrading to ArcDesktop 10.3, I started having a problem adding Excel 2010 tables. I'm getting an error message that says: "connect. Failed to connect to database. An underlying database error occurred. Class not registered." If I save the Excel 2010 file as Excel 97-03, I don't have the problem. But, of course, that limits me to about 64,000 rows of data. and I have a spreadsheet of 400,000 oil and gas wells I want to map. Can anyone help?
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