I get this error ...

Odoo Server Error

Traceback (most recent call last):

File "/opt/odoo/odoo-server/openerp/http.py", line 530, in _handle_exception

return super(JsonRequest, self)._handle_exception(exception)

File "/opt/odoo/odoo-server/openerp/http.py", line 567, in dispatch

result = self._call_function(**self.params)

File "/opt/odoo/odoo-server/openerp/http.py", line 303, in _call_function

return checked_call(self.db, *args, **kwargs)

File "/opt/odoo/odoo-server/openerp/service/model.py", line 113, in wrapper

return f(dbname, *args, **kwargs)

File "/opt/odoo/odoo-server/openerp/http.py", line 300, in checked_call

return self.endpoint(*a, **kw)

File "/opt/odoo/odoo-server/openerp/http.py", line 796, in __call__

return self.method(*args, **kw)

File "/opt/odoo/odoo-server/openerp/http.py", line 396, in response_wrap

response = f(*args, **kw)

File "/opt/odoo/odoo-server/addons/web/controllers/main.py", line 949, in call_kw

return self._call_kw(model, method, args, kwargs)

File "/opt/odoo/odoo-server/addons/web/controllers/main.py", line 941, in _call_kw

return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)

File "/opt/odoo/odoo-server/openerp/api.py", line 241, in wrapper

return old_api(self, *args, **kwargs)

File "/opt/odoo/odoo-server/addons/account/account_move_line.py", line 160, in default_get

data = self._default_get(cr, uid, fields, context=context)

File "/opt/odoo/odoo-server/openerp/api.py", line 241, in wrapper

return old_api(self, *args, **kwargs)

File "/opt/odoo/odoo-server/addons/account/account_move_line.py", line 246, in _default_get

for move_line_dict in move_obj.resolve_2many_commands(cr, uid, 'line_id', context.get('line_id'), context=context):

File "/opt/odoo/odoo-server/openerp/api.py", line 241, in wrapper

return old_api(self, *args, **kwargs)

File "/opt/odoo/odoo-server/openerp/models.py", line 5090, in resolve_2many_commands

for record in other_model.read(cr, uid, record_ids, fields=fields, context=context):

File "/opt/odoo/odoo-server/openerp/api.py", line 241, in wrapper

return old_api(self, *args, **kwargs)

File "/opt/odoo/odoo-server/openerp/models.py", line 3128, in read

result = BaseModel.read(records, fields, load=load)

File "/opt/odoo/odoo-server/openerp/api.py", line 239, in wrapper

return new_api(self, *args, **kwargs)

File "/opt/odoo/odoo-server/openerp/models.py", line 3163, in read

self._read_from_database(stored, inherited)

File "/opt/odoo/odoo-server/openerp/api.py", line 239, in wrapper

return new_api(self, *args, **kwargs)

File "/opt/odoo/odoo-server/openerp/models.py", line 3357, in _read_from_database

record._cache.update(record._convert_to_cache(vals, validate=False))

File "/opt/odoo/odoo-server/openerp/models.py", line 5299, in _convert_to_cache

for name, value in values.iteritems()

File "/opt/odoo/odoo-server/openerp/models.py", line 5300, in <dictcomp>

if name in fields

File "/opt/odoo/odoo-server/openerp/fields.py", line 1025, in convert_to_cache

return float_round(float(value or 0.0), precision_digits=self.digits[1])

TypeError: float() argument must be a string or a number

When I try to add a line to accounting journal.