Hi, I have Openerp 7.0 installed on ubuntu server 12.04. I have problem with follow up clients. It does'nt work and I have this error message :

OpenERP Server Error Client Traceback (most recent call last): File "/opt/openerp/server/openerp/addons/web/http.py", line 203, in dispatch response["result"] = method(self, *self.params) File "/opt/openerp/server/openerp/addons/web/controllers/main.py", line 1083, in call_button action = self._call_kw(req, model, method, args, {}) File "/opt/openerp/server/openerp/addons/web/controllers/main.py", line 1071, in _call_kw return getattr(req.session.model(model), method)(args, **kwargs) File "/opt/openerp/server/openerp/addons/web/session.py", line 43, in proxy result = self.proxy.execute_kw(self.session._db, self.session._uid, self.session._password, self.model, method, args, kw) File "/opt/openerp/server/openerp/addons/web/session.py", line 31, in proxy_method result = self.session.send(self.service_name, method, *args) File "/opt/openerp/server/openerp/addons/web/session.py", line 104, in send raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)

Server Traceback (most recent call last): File "/opt/openerp/server/openerp/addons/web/session.py", line 90, in send return openerp.netsvc.dispatch_rpc(service_name, method, args) File "/opt/openerp/server/openerp/netsvc.py", line 293, in dispatch_rpc result = ExportService.getService(service_name).dispatch(method, params) File "/opt/openerp/server/openerp/service/web_services.py", line 618, in dispatch res = fn(db, uid, params) File "/opt/openerp/server/openerp/osv/osv.py", line 188, in execute_kw return self.execute(db, uid, obj, method, *args, *kw or {}) File "/opt/openerp/server/openerp/osv/osv.py", line 131, in wrapper return f(self, dbname, args, *kwargs) File "/opt/openerp/server/openerp/osv/osv.py", line 197, in execute res = self.execute_cr(cr, uid, obj, method, args, *kw) File "/opt/openerp/server/openerp/osv/osv.py", line 185, in execute_cr return getattr(object, method)(cr, uid, args, *kw) File "/opt/openerp/server/openerp/addons/account_followup/wizard/account_followup_print.py", line 224, in do_process restot = self.process_partners(cr, uid, partner_list, data, context=context) File "/opt/openerp/server/openerp/addons/account_followup/wizard/account_followup_print.py", line 153, in process_partners partner_obj.do_partner_manual_action(cr, uid, [partner.partner_id.id], context=context) File "/opt/openerp/server/openerp/addons/account_followup/account_followup.py", line 181, in do_partner_manual_action 'payment_responsible_id': responsible_id}) File "/opt/openerp/server/openerp/addons/account_followup/account_followup.py", line 296, in write partner_ids = [(6, 0, [responsible_partner_id])]) File "/opt/openerp/server/openerp/addons/mail/mail_thread.py", line 934, in message_post partner_ids = set(kwargs.pop('partner_ids', [])) TypeError: unhashable type: 'list'