Hello

Everytime i'm installing modules i get this error. No modules will be installed. Has anyone a explanition of this?

OpenERP Server Error

Traceback (most recent call last): File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 499, in _handle_exception File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 516, in dispatch File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 282, in _call_function File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\service\model.py", line 113, in wrapper File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 279, in checked_call File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 732, in __call__ File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\http.py", line 375, in response_wrap File "C:\Program Files\Odoo 8.0-20140920-000204\server\openerp\addons\web\controllers\main.py", line 948, in call_button File "C:\Program Files\Odoo 8.0-20140920-000204\server\openerp\addons\web\controllers\main.py", line 936, in _call_kw File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper File "C:\Program Files\Odoo 8.0-20140920-000204\server\openerp\addons\base\module\module.py", line 450, in button_immediate_install File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper File "C:\Program Files\Odoo 8.0-20140920-000204\server\openerp\addons\base\module\module.py", line 497, in _button_immediate_function File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\modules\registry.py", line 324, in new File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\modules\loading.py", line 358, in load_modules File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\modules\loading.py", line 263, in load_marked_modules File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\modules\loading.py", line 185, in load_module_graph File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\modules\loading.py", line 118, in _load_data File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\tools\convert.py", line 899, in convert_file File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\tools\convert.py", line 985, in convert_xml_import File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\tools\convert.py", line 851, in parse File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\tools\convert.py", line 765, in _tag_record File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper File "C:\Program Files\Odoo 8.0-20140920-000204\server\openerp\addons\base\ir\ir_model.py", line 1047, in _update File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 237, in wrapper File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 332, in old_api File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\models.py", line 3972, in create File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 235, in wrapper File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 464, in new_api File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\models.py", line 4153, in _create File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\api.py", line 235, in wrapper File "C:\Program Files\Odoo 8.0-20140920-000204\server\.\openerp\models.py", line 1294, in _validate_fields ParseError: "ValidateError Field(s) `date_stop` failed against a constraint: Error! The period is invalid. Either some periods are overlapping or the period's dates are not matching the scope of the fiscal year." while parsing file:///C:/Program Files/Odoo 8.0-20140920-000204/server/openerp/addons/account/demo/account_demo.xml:30, near <record id="period_1" model="account.period"> <field eval="'01/'+time.strftime('%Y')" name="code"/> <field eval="'X 01/'+time.strftime('%Y')" name="name"/> <field name="fiscalyear_id" ref="data_fiscalyear"/> <field eval="time.strftime('%Y')+'-01-01'" name="date_start"/> <field eval="time.strftime('%Y')+'-01-31'" name="date_stop"/> <field name="company_id" ref="base.main_company"/> </record>