hi i try to account with mysql here are the mysql start stop and update definition accounting_start_query = "INSERT into radaact SET\ `User-Name` = '%{User-Name}',\ `Calling-Station-Id` = '%{Calling-Station-Id}',\ `Called-Station-Id` = '%{Called-Station-Id}',\ `NAS-IP-Address` = '%{NAS-IP-Address}',\ `NAS-Port` = %{NAS-Port},\ `Timestamp Start` = NOW(),\ `Acct-Unique-Session-Id` = '%{Acct-Unique-Session-Id}' " accounting_update_query = "UPDATE radaact SET\ `Acct-Session-Time` = '%{Acct-Session-Time}',\ `Acct-Input-Octets` = '%{Acct-Input-Octets}',\ `Acct-Output-Octets` = '%{Acct-Output-Octets}',\ `Acct-Input-Packets` = '%{Acct-Input-Packets}',\ `Acct-Output-Packets` = '%{Acct-Output-Packets}'\ WHERE `Acct-Unique-Session-Id` = '%{Acct-Unique-Session-Id}'\ LIMIT 1 " accounting_stop_query = "UPDATE radaact SET\ `Timestamp Stop` = NOW(),\ `Acct-Session-Time` = '%{Acct-Session-Time}',\ `Acct-Input-Octets` = '%{Acct-Input-Octets}',\ `Acct-Output-Octets` = '%{Acct-Output-Octets}',\ `Acct-Input-Packets` = '%{Acct-Input-Packets}',\ `Acct-Output-Packets` = '%{Acct-Output-Packets}',\ `Acct-Terminate-Cause` = '%{Acct-Terminate-Cause}'\ WHERE `Acct-Unique-Session-Id` = '%{Acct-Unique-Session-Id}'\ LIMIT 1 " update works fine rlm_sql (sql): sql_set_user escaped user --> 'xxxx' radius_xlat: 'UPDATE radaact SET??`Acct-Session-Time` = '292',??`Acct-Input-Octets` = '94237',??`Acct-Output-Octets` = '937628',??`Acct-Input-Packets` = '597',??`Acct-Output-Packets` = '816'?WHERE `Acct-Unique-Session-Id` = '814b38bc0e9c60f4'?LIMIT 1 ' rlm_sql (sql): Reserving sql socket id: 2 radius_xlat: '' rlm_sql (sql): Released sql socket id: 2 modcall[accounting]: module "sql" returns ok for request 61 modcall: leaving group accounting (returns ok) for request 61 but start and stop not rlm_sql (sql): sql_set_user escaped user --> 'yyyy' radius_xlat: 'INSERT into radaact SET ' rlm_sql (sql): Reserving sql socket id: 4 rlm_sql_mysql: MYSQL check_error: 1064 received rlm_sql (sql): Couldn't insert SQL accounting START record - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 radius_xlat: '' rlm_sql (sql): Released sql socket id: 4 modcall[accounting]: module "sql" returns ok for request 59 modcall: leaving group accounting (returns ok) for request 59 rlm_sql (sql): sql_set_user escaped user --> 'yyyy' radius_xlat: 'UPDATE radaact SET ' rlm_sql (sql): Reserving sql socket id: 3 rlm_sql_mysql: MYSQL check_error: 1064 received rlm_sql (sql): Couldn't update SQL accounting STOP record - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 rlm_sql (sql): Released sql socket id: 3 modcall[accounting]: module "sql" returns fail for request 60 modcall: leaving group accounting (returns fail) for request 60 i use mysql 4.1 , freeradius 1.1 thanks for help basile