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Trying to join a shapefile layer - polygons - (municipalities with a data table with corresponding data sets) an Excel file with the .xlsx extension, BUT as showed in the attached image some error occurs.

Any suggestions what's wrong with this join procedure?

enter image description here

marked as duplicate by whyzar, nmtoken, aldo_tapia, JGH, Kersten Feb 15 '18 at 14:50

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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    Hi Tom. Please take the tour and put some more detail in your question. – Mattropolis Feb 14 '18 at 19:03

Please explain the question in more detail but seeing how this issue comes up again over time I believe the issue is with the Excel file. Try exporting the .xlsx file to a .csv file then join. ArcMap does not like .xlsx files (you can also try a .xls filetype)

In addition, downloading the 2007 Office System Driver will rectify many issues with excel files. https://www.microsoft.com/en-us/download/details.aspx?id=23734

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