Hi, The debug logs are(emphasis added): (6) Executing select query: SELECT (SUM(acctoutputoctets+acctinputoctets)) AS total FROM radacct WHERE radacct.username='test' AND Year(acctstarttime) = (Year(NOW())) rlm_sql (sql): Released connection (6) (6) EXPAND %{sql: SELECT (SUM(acc toutputoctets+acctinputoctets)) AS total FROM radacct WHERE radacct.username='%{User-Name}' AND Year(acctstarttime) = (Year(NOW())) } (6) --> 241450422693 (6) Tmp-Integer-0 := 932254117 (6) EXPAND %{User-Name} (6) --> test (6) SQL-User-Name set to 'test' rlm_sql (sql): Reserved connection (7) (6) Executing select query: SELECT groupname FROM radusergroup WHERE username = 'test' ORDER BY priority rlm_sql (sql): Released connection (7) (6) EXPAND %{User-Name} (6) --> test (6) SQL-User-Name set to 'test' rlm_sql (sql): Reserved connection (4) (6) Executing select query: SELECT value FROM radgroupcheck WHERE attribute='Yearly-Bytes-Limit' AND grou pname='4Mbps_YR_225GB' rlm_sql (sql): Released connection (4) (6) EXPAND %{sql: SELECT value FROM radgroupcheck WHERE attribute='Yearly-Bytes-Limit' AND grou pname='%{sql: SELECT groupname FROM radusergroup WHERE username = '%{User-Name}' ORDER BY priority}'} (6) --> 241591910400 (6) Tmp-String-1 := 241591910400 (6) } # update control = noop Why is their an overflow in the first case? I am using radius3 The same query is used by the relevant sqlcounter module and it works as expected and doesn't overflow. I am trying to send CoA disconnect to the NAS after the user exhuasts their data with sql and unlang logic in accounting section. I also tried simply using the reply attribute Mikrotik-Total-Limit but the the NAS also expected Mikrotik-Total-Limit-Gigawords. The sqlcounter I made simply sent overflown value in Mikrotik-Total-Limit and hence lmit of more than 4Gb couldn't be enforced. Any way I can send the extra reply attribute from the sqlcounter?