Trying to convert date formats when I am importing an Excel 2010 worksheet.  Am using LIBNAME engine to import worksheet in which "Date_Effective" column is in a datetime type Excel format.  Code is:   libname xl XLSX "C:\ROSTER.xlsx"; data ROSTER_IN; set xl.'sheet2015$'n(SASDATEFMT=(Date_Effective=MMDDYY8.); run;   from log...   set xl.'sheet2015$'n(SASDATEFMT=(Date_Effective=MMDDYY8.));                        ----------                        22 ERROR 22-7: Invalid option name SASDATEFMT.   Thought option SASDATEFMT was ok to use with Excel2010 files.  Any thoughts on how to fix problem? ... View more