You can use the File Import node to import both .xls and .xlsx files into SAS Enterprise Miner. The latest documentation for this node is located at http://go.documentation.sas.com/?docsetId=emref&docsetTarget=p1rk96oj5sk2tyn1esay58oha0o3.htm&docsetVersion=14.3 and includes some information about common pitfalls that you might encounter.
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