Hi, is it possible to read WAL files ? sql/ log.<transaction id> why ? We still have a problem of duplicate table . All our monetsdb are updated with the latest version of the repository debian8 , and that several server. We have learned to remove duplicate tables and a stable production. But I want to understand this bug Duplication of tables are always created after a restart monetdb After reading this page https://www.monetdb.org/blog/monetdb-sql-transaction-management-scheme, and particularly this ""By default, persisted transactions are cleaned up from the WAL. During database startup, all transaction still left in the WAL are read and any that are not yet applied are written into the persistent BAT storage"" . I think that the drop or create commands are not cleaned up from the WAL We used the library php _ map.inci and we run a lot of command drop / create ( ... I know this is not recommended ... ) We used autocommit. If I can read and understand what is in the WAL file, can help me understand this bug Thank Pierre -- 1G6 52 route de bischwiller 67300 Schiltigheim Société de Services et de Formations en Logiciels Libres http://1g6.biz Tél : 06 64 63 70 35 // 09 54 38 70 90