Thanks for your input guys but - In the past I though I had a way with words but it seems now that I deal only with 'if this then not that' I have a hard time writing clearly. Let me retry. Both machines had the same table (same # of rec with same data) with the same data. Machine A ( test machine ) when running the stonefield repair proc, reported 'Duplicate index key'. This more or less crashed my app. When I came back to the development machine ( Machine B and completely independent of machine B), I was able to open the same table and able to determine that there was NOT a duplicate on the primary key ( no deleted records and no matching records). I then ran the app on machine B and sure enough when the stonefield repair proc was run (oMeta.Osdtmgr.Repair('ALL')) I got the same error. When I went back to the command window the DBF was trashed. It was in good condition before I ran repair. This scares me somewhat and I would like to know what happened.