proc format; invalue $newdate '01JAN1990'd - '31DEC2004'd = 'Too Early' '01JAN2005'd - '31DEC2005'd = [mmddyy10.] '01JAN2007'd - high = 'Too Late'; run; After running this, I kept getting the following error: ERROR: These two ranges overlap: '01JAN1990'd-'31DEC2004'd and '01JAN2007'd-HIGH (fuzz=0). ERROR: These two ranges overlap: '01JAN2007'd-HIGH and '01Jan2005'd-'31DEC2005'd (fuzz=0). Thanks.
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