*(Q) A file has cases with the same ID. How can I save a copy of duplicates in a separate file. *(A) Posted to SPSSX-L list by Raynald Levesque on 20002/09/14. DATA LIST LIST /Casenb ID. BEGIN DATA 1 1 2 2 3 2 4 3 5 4 6 5 7 5 END DATA. LIST. SAVE OUTFILE='c"\\temp\\original data.sav'. SORT CASES BY ID. MATCH FILES FILE=* /BY=id /FIRST=first /LAST=last. SELECT IF SUM(first,last)<2. SAVE OUTFILE='c:\\temp\\duplicates.sav' /DROP=first last. *Casenb 2,3,6 and 7 are in the duplicates.sav file.