This link just query data from HISTORY table. But there is something missed in HISTORY table. I have tried to made memory inventory changed at one agent, and I got it in 'inventory history log' which under view pull down function list. But I didn't get it from the query which you memtioned link as above. I think the data in HISTORY table is not the same as 'inventory history log'. Does any one has the similar experience or advise for this? Thanks a lot!