Hi, it seems that some people have problems building the latest trunk version of Hibernate Core. I was one of them and after figuring out where goes what in the new build I found this: Caused by: org.h2.jdbc.JdbcSQLException: Cannot change the setting "MVCC" when the database is already open; SQL statement: SET MVCC TRUE [90133-134] at org.h2.message.DbException.getJdbcSQLException(DbException.java:316) at org.h2.message.DbException.get(DbException.java:167) at org.h2.message.DbException.get(DbException.java:144) at org.h2.command.dml.Set.update(Set.java:233) at org.h2.command.CommandContainer.update(CommandContainer.java:70) at org.h2.command.Command.executeUpdate(Command.java:198) at org.h2.engine.Engine.openSession(Engine.java:159) at org.h2.engine.Engine.getSession(Engine.java:120) at org.h2.engine.Session.createSession(Session.java:119) at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:237) at org.h2.engine.SessionRemote.createSession(SessionRemote.java:215) at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:111) at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:95) at org.h2.Driver.connect(Driver.java:58) at java.sql.DriverManager.getConnection(DriverManager.java:582) at java.sql.DriverManager.getConnection(DriverManager.java:154) at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(Driv erManagerConnectionProvider.java:133) at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java: 446) This led me to the file hibernate-core/src/test/resources/hibernate.properties where I removed the MVCC=TRUE from the connection url. Now the tests passed. I am not sure yet why this option seems to make a difference on some systems and not on others, but in case you are having build problems as well try modifying the driver url (at least for now). This might be JDK/OS related, since so far t only affected me and Emmanuel and we are both using Mac with the provided JDK 1.6. In case you have any idea why this option makes a difference let us know. --Hardy _______________________________________________ hibernate-dev mailing list hibernate-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev