Moayad,  check on the database in ir_module_module table which modules have the state 'to upgrade' or 'to install'.  Those that are 'to upgrade', change the state to 'installed' and those that are 'to install' change it to 'uninstalled'.  Note the changes that you are making while you're at it (which module is change to what state). Restart the server.

Now, how do you exactly remove module?  You sould use the Uninstall button of that module.  It will warn you if there are any other module that are depending on the module that you are installing.  It seems that the module removal is somehow done by force and hence causing the database to be inconsistent.

Many thanks , the problem solved but

new problem is : TypeError: cannot concatenate 'str' and 'bool' objects

this error apears once i moved from page to page , trying to uninstall module .

i tried to convert the values in the return statment into str but nothing happens .

" im trying to solve the problems manually to be familiar with openerp "

OpenERP Server Error

Client Traceback (most recent call last): File "C:\OpenERP\Server\server\openerp\addons\web\http.py", line 204, in dispatch File "C:\OpenERP\Server\server\openerp\addons\web\controllers\main.py", line 1132, in call_button File "C:\OpenERP\Server\server\openerp\addons\web\controllers\main.py", line 1120, in _call_kw File "C:\OpenERP\Server\server\openerp\addons\web\session.py", line 42, in proxy File "C:\OpenERP\Server\server\openerp\addons\web\session.py", line 30, in proxy_method File "C:\OpenERP\Server\server\openerp\addons\web\session.py", line 103, in send Server Traceback (most recent call last): File "C:\OpenERP\Server\server\openerp\addons\web\session.py", line 89, in send File "C:\OpenERP\Server\server\.\openerp\netsvc.py", line 296, in dispatch_rpc File "C:\OpenERP\Server\server\.\openerp\service\web_services.py", line 622, in dispatch File "C:\OpenERP\Server\server\.\openerp\service\security.py", line 40, in check File "C:\OpenERP\Server\server\.\openerp\pooler.py", line 49, in get_pool File "C:\OpenERP\Server\server\.\openerp\pooler.py", line 33, in get_db_and_pool File "C:\OpenERP\Server\server\.\openerp\modules\registry.py", line 203, in get File "C:\OpenERP\Server\server\.\openerp\modules\registry.py", line 233, in new File "C:\OpenERP\Server\server\.\openerp\modules\loading.py", line 350, in load_modules File "C:\OpenERP\Server\server\.\openerp\modules\loading.py", line 256, in load_marked_modules File "C:\OpenERP\Server\server\.\openerp\modules\loading.py", line 192, in load_module_graph File "C:\OpenERP\Server\server\.\openerp\modules\loading.py", line 77, in <lambda> File "C:\OpenERP\Server\server\.\openerp\modules\loading.py", line 124, in _load_data File "C:\OpenERP\Server\server\.\openerp\tools\convert.py", line 959, in convert_xml_import File "C:\OpenERP\Server\server\.\openerp\tools\convert.py", line 852, in parse File "C:\OpenERP\Server\server\.\openerp\tools\convert.py", line 819, in _tag_record File "C:\OpenERP\Server\server\openerp\addons\base\ir\ir_model.py", line 971, in _update File "C:\OpenERP\Server\server\openerp\addons\project\project.py", line 570, in create File "C:\OpenERP\Server\server\openerp\addons\mail\mail_thread.py", line 252, in create File "C:\OpenERP\Server\server\.\openerp\osv\orm.py", line 4444, in create File "C:\OpenERP\Server\server\openerp\addons\project\project.py", line 1328, in create File "C:\OpenERP\Server\server\openerp\addons\mail\mail_thread.py", line 256, in create File "C:\OpenERP\Server\server\openerp\addons\mail\mail_thread.py", line 1183, in message_post File "C:\OpenERP\Server\server\openerp\addons\mail\mail_message.py", line 750, in create File "C:\OpenERP\Server\server\.\openerp\osv\orm.py", line 4561, in create File "C:\OpenERP\Server\server\.\openerp\osv\orm.py", line 4714, in _store_set_values File "C:\OpenERP\Server\server\.\openerp\osv\fields.py", line 1145, in get File "C:\OpenERP\Server\server\openerp\addons\mail\mail_message.py", line 81, in _get_record_name File "C:\OpenERP\Server\server\openerp\addons\analytic\analytic.py", line 116, in name_get File "C:\OpenERP\Server\server\openerp\addons\analytic\analytic.py", line 131, in _get_one_full_name File "C:\OpenERP\Server\server\openerp\addons\analytic\analytic.py", line 134, in _get_one_full_name TypeError: cannot concatenate 'str' and 'bool' objects

Best Regards .