Hi all, Any idea why I am getting this error: A) ERROR ALTER TABLE login -> ADD CONSTRAINT fk_db_perfil FOREIGN KEY (id_perfil) -> REFERENCES db_perfil (id_perfil) -> ON DELETE NO ACTION -> ON UPDATE NO ACTION;ERROR 1005 (HY000): Can't create table 'dbhomo_aa.#sql-c1f_281' (errno: 150)dbhomo_aa-> dbhomo_aa-> B) HERE IT WORKS dbhomo_aa-> ALTER TABLE login ADD CONSTRAINT fk_db_perfil FOREIGN KEY (id_perfil) REFERENCES dbhomo.db_perfil (id_perfil) ON DELETE NO ACTION ON UPDATE NO ACTION; Query OK, 35199 rows affected (3,27 sec) Records: 35199 Duplicates: 0 Warnings: 0 Note that when I change the database to the original database the command works as expected. Both tables are innodb, the permissions are fine. Thanks, Alex