Hi guys,

When i want to check my customer invoices it appear like this 

Odoo Server Error

Traceback (most recent call last):
  File "/opt/odoo/openerp/http.py", line 539, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/openerp/http.py", line 576, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo/openerp/http.py", line 312, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo/openerp/service/model.py", line 118, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo/openerp/http.py", line 309, in checked_call
    return self.endpoint(*a, **kw)
  File "/opt/odoo/openerp/http.py", line 805, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo/openerp/http.py", line 405, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo/openerp/addons/web/controllers/main.py", line 884, in search_read
    return self.do_search_read(model, fields, offset, limit, domain, sort)
  File "/opt/odoo/openerp/addons/web/controllers/main.py", line 905, in do_search_read
    request.context)
  File "/opt/odoo/openerp/http.py", line 910, in proxy
    result = meth(cr, request.uid, *args, **kw)
  File "/opt/odoo/openerp/api.py", line 268, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/openerp/models.py", line 5170, in search_read
    record_ids = self.search(cr, uid, domain or [], offset=offset, limit=limit, order=order, context=context)
  File "/opt/odoo/openerp/api.py", line 268, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/openerp/models.py", line 1646, in search
    return self._search(cr, user, args, offset=offset, limit=limit, order=order, context=context, count=count)
  File "/opt/odoo/openerp/api.py", line 268, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/openerp/models.py", line 4673, in _search
    query = self._where_calc(cr, user, args, context=context)
  File "/opt/odoo/openerp/api.py", line 268, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/openerp/models.py", line 4484, in _where_calc
    e = expression.expression(cr, user, domain, self, context)
  File "/opt/odoo/openerp/osv/expression.py", line 662, in __init__
    self.parse(cr, uid, context=context)
  File "/opt/odoo/openerp/osv/expression.py", line 830, in parse
    raise ValueError("Invalid field %r in leaf %r" % (left, str(leaf)))
ValueError: Invalid field 'picking' in leaf "<osv.ExtendedLeaf: ('picking', '!=', True) on account_invoice (ctx: )>"

So any idea

thnx