Dear all,

I need to inherit the osv_memory model 'pos.session.opening' but when I try to install my custom module, I get this error: 

[...] 
 File "/home/ale/Projects/odoo/openerp/models.py", line 592, in _build_model
original_module = pool[name]._original_module if name in parents else cls._module
 File "/home/ale/Projects/odoo/openerp/modules/registry.py", line 101, in __getitem__
return self.models[model_name]

KeyError: 'pos.session.opening' 

This is my code:

from openerp.osv import osv
class pos_session_opening(osv.osv_memory):
    _inherit = 'pos.session.opening'
    _name = 'pos.session.opening'
    
    [...]

If I replace the 'pos.session.opening' string in both variables with 'res.config' (which is also osv_memory) I get no error at all..

I'm I doing something wrong?

Regards!