Hi,

if you download openerp from Nightly OpenERP (http:// nightly.openerp. com/) existly list :

....

openerp-7.0-20130714-....tar.gz

openerp-7.0-20130715-....tar.gz

openerp-7.0-20130716-....tar.gz

.....

1-is that we must always work with the same version?

for example I installe openerp-7.0-xxxxxxxx-....tar.gz for my customer . customer decided to change the web host. i exported database and I downloaded openerp-7.0-20130716-....tar.gz if i imported the database to my new openerp instalation it displays errors incompatibility database.

2-Means in my production environment should keep several version of openerp :

openerp_to_customer1

openerp_to_customer2

..

openerp_to_customerN

Thanks.