How to use oracle extensions?

General Discussion
4

I have another problem, when trying:

   
        <ora:createTrigger
        afterBeforeInsteadOf=“before”
        procedure=“begin select departments_seq.nextval into :new.id from dual; end;” 
        triggerName=“departments_trg”
        tableName=“departments”
        insert=“true”
        forEachRow=“true”
        />     
     

I get:
LiquiBase Update Failed: Validation Failed:
    1 changes have validation errors
          java.lang.NoSuchMethodError: liquibase.exception.ValidationErrors.chec
kDisallowedField(Ljava/lang/String;Ljava/lang/Object;)V
.  For more information, use the --logLevel flag)
SEVERE 9.4.2010 14:10:liquibase: Validation Failed:
    1 changes have validation errors
          java.lang.NoSuchMethodError: liquibase.exception.ValidationErrors.chec
kDisallowedField(Ljava/lang/String;Ljava/lang/Object;)V

liquibase.exception.ValidationFailedException: Validation Failed:
    1 changes have validation errors
          java.lang.NoSuchMethodError: liquibase.exception.ValidationErrors.chec
kDisallowedField(Ljava/lang/String;Ljava/lang/Object;)V

        at liquibase.changelog.DatabaseChangeLog.validate(DatabaseChangeLog.java
:131)
        at liquibase.Liquibase.update(Liquibase.java:97)
        at liquibase.integration.commandline.Main.doMigration(Main.java:664)
        at liquibase.integration.commandline.Main.main(Main.java:105)