I have installed both Odoo 8.0 and 9.0. I have the Odoo 8.0 working fine on port 8069 but when I installed Odoo 9.0 and got it working on port 8070, Odoo 8.0 now throws 500 server error. I tried to reinstall Odoo 8.0 from start, but this time using virtualenv so it does not conflict with the dependencies of Odoo 9.0, but running it using: (Odoo8venv)user@domain:~/Odoo8venv/bin/python ~/odoo-8.0/odoo.py -c ~/odoo-dev/custom.conf Still throws error: 2015-11-20 01:32:50,660 6772 ERROR test openerp.modules.graph: module website_partner: Unmet dependencies: website 2015-11-20 01:32:50,660 6772 ERROR test openerp.modules.graph: module portal: Unmet dependencies: share, auth_signup 2015-11-20 01:32:50,660 6772 WARNING test openerp.modules.graph: Some modules were not loaded. I think it is because Odoo 8.0 sees the databases created using Odoo 9.0. Should I create a new postgresql server on a different port for Odoo 8.0? Or how can I make both of them run? Continue reading...