DETAILS Consecutive date or time variables with different date(or time) maps will be incorectly combined in TO lists if they have the same internal ranges, missing values, valid values or value label. When this code is executed it will produce an error. EXAMPLE PROGRAM DATA LIST DATE2 * (DATE'EMM/YYYY') DATE3 * (DATE'DD/MM/YYYY') VAR RANGES DATE2 ('01/2000' '12/2010') DATE3 ('01/01/2000' '01/12/2010') writes VAR RANGES DATE2 TO DATE3 ('01/01/2000' '01/12/2010') WORKAROUND Separate the variables or Change the values so they are a little different or use the NOTO option on EXPORT or WRITE SCHEMA