I Found the solution:Use ArcGIS Desktop 10.1 since its powerful in client administration of SDE.I have performed "FULL RECONCILE" for all versions using ArcCatalog 10.1 . Then, on the database server where my ArcSDE engine isresiding i have executed the "compress command".you will receive a "constraint issue" and the compress will fail .....that's fine .....all what you need is to use the sdegdbrepair command. to check more details about the feature class or table that is causing this, check the last records of your ArcSDE logs on the server.sdegdbrepair -o repair_tables -d <{ORACLE10G|ORACLE11G|SQLSERVER|DB2|DB2ZOS|INFORMIX|POSTGRESQL}>[-r versioned table name | file=<table_list>] [-V {ALL | NONE | <version_name>} | STATE:<state_id>][-H <home_directory>] [-u <ArcSDE_admin_user>] [-p <ArcSDE_admin_password>][-D <database_name>] [-s <server_name>] [-i <master_geodatabase_service>:<user_schema>] [-N] [-q]the parameters in red are the important ones ...ArcSDE Command reference: http://help.arcgis.com/en/geodatabase/10.0/admin_cmds/support_files/whnjs.htmRegards,Emad Al-Mousa