i need to make down grade from 3.9 to 3.8.6 can i use the MySQL dump of data base to replace it in 3.8.6 or there will be differences between tow version in data base structure and what the important things i need to do or take care about when i does this operationthanks Mohamed El ZalabanyIntegrated library systems consultant Zalabany Knowledge Systems Team© For Libraries and Information systems Development and support mh_zalabany@hotmail.com Mobile: 0111291444