Hello Group, Need an explanation for the following occurrence. We have a large script doing approximately 2000 updates. Within this script there is a update of a date column with a date such as '8-SEP-2004' i.e. update pm set pm15 = 'Y',pm1 = 'EMTR-C',crewid = 'CREW06',supervisor = '6113603',pm4 = 'A',pmcounter = '2',pm13 = 'MON',firstdate = '8-NOV-2004',nextdate = '8-NOV-2004' where pmnum = 'L1050216'; update pm set pm15 = 'Y',pm1 = 'EMTR-C',crewid = 'CREW06',supervisor = '6113603',pm4 = 'A',pmcounter = '2',pm13 = 'MON',firstdate = '8-NOV-2004',nextdate = '8-NOV-2004' where pmnum = 'L1050217'; update pm set pm15 = 'Y',pm1 = 'EMTR-C',crewid = 'CREW06',supervisor = '6113603',pm4 = 'A',pmcounter = '3',pm13 = 'MON',firstdate = '11-OCT-2004',nextdate = '11-OCT-2004' where pmnum = 'L1052951'; update pm set pm15 = 'Y',pm1 = 'EMTR-C',crewid = 'CREW06',supervisor = '6113603',pm4 = 'A',pmcounter = '2',pm13 = 'MON',firstdate = '20-SEP-2004',nextdate = '20-SEP-2004' where pmnum = 'L1052952'; update pm set pm15 = 'Y',pm1 = 'EMTR-C',crewid = 'CREW06',supervisor = '6113603',pm4 = 'A',pmcounter = '2',pm13 = 'MON',firstdate = '20-SEP-2004',nextdate = '20-SEP-2004' where pmnum = 'L1052953'; Once this script has been run, column firstdate will be updated to an arbitrary date like 20-SEP-2004 instead of 8-NOV-2004. Dates of more than two characters seem to work OK, ie '11-SEP-2004'. I have tried alter session and setting nvl_date_format = 'DD-MON-YYYY'. Same thing. A single row update, as in highlight one row and then execute works fine. Run this script in different front ends including toad. Same thing. I have tried placing a commit after each line same issue. I have studied the triggers and procedures for some clue nothing, there is no reversing code. Has anyone experienced this before? Any explanations? Is there something else I can try to debug this issue that I have not tried? Many Thanks Denham -- To unsubscribe - mailto:oracle-l-request@xxxxxxxxxxxxx&subject=unsubscribe To search the archives - //www.freelists.org/archives/oracle-l/