Hi,

your error is a problem of string encoding (you are using a special caracter somewhere) :

  File "C:\Odoo10\server\odoo\addons\purchase\models\purchase.py", line 188, in name_get

  File "C:\Odoo10\server\odoo\tools\misc.py", line 1182, in formatLang

  File "C:\Odoo10\server\odoo\addons\base\res\res_lang.py", line 263, in format

UnicodeDecodeError: 'ascii' codec can't decode byte 0xa0 in position 2: ordinal not in range(128)

the fonction called where you have the error is name_get, see the code here line 181 :

https://github.com/odoo/odoo/blob/10.0/addons/purchase/models/purchase.py

so, verify values for fields Order reference, Vendor Reference, currency name (probally, problem with formatlang line 188 ), check for spécial caracter / symbol.

note that the currency name should be ISO 4217, see field name line 20 in the file here:

https://github.com/odoo/odoo/blob/10.0/odoo/addons/base/res/res_currency.py

regards

Hello,

thank you  for the advice. this si the log:

2018-10-12 06:45:22,401 3780 ERROR 123 odoo.http: Exception during JSON request handling.

Traceback (most recent call last):

  File "C:\Odoo10\server\odoo\http.py", line 642, in _handle_exception

  File "C:\Odoo10\server\odoo\http.py", line 684, in dispatch

  File "C:\Odoo10\server\odoo\http.py", line 334, in _call_function

  File "C:\Odoo10\server\odoo\service\model.py", line 101, in wrapper

  File "C:\Odoo10\server\odoo\http.py", line 327, in checked_call

  File "C:\Odoo10\server\odoo\http.py", line 942, in __call__

  File "C:\Odoo10\server\odoo\http.py", line 507, in response_wrap

  File "C:\Odoo10\server\odoo\addons\web\controllers\main.py", line 895, in call_kw

  File "C:\Odoo10\server\odoo\addons\web\controllers\main.py", line 887, in _call_kw

  File "C:\Odoo10\server\odoo\api.py", line 687, in call_kw

  File "C:\Odoo10\server\odoo\api.py", line 672, in call_kw_model

  File "C:\Odoo10\server\odoo\addons\purchase\models\purchase.py", line 196, in create

  File "C:\Odoo10\server\odoo\addons\mail\models\mail_thread.py", line 233, in create

  File "C:\Odoo10\server\odoo\addons\mail\models\mail_thread.py", line 1886, in message_post

  File "C:\Odoo10\server\odoo\addons\mail\models\mail_message.py", line 740, in create

  File "C:\Odoo10\server\odoo\addons\mail\models\mail_message.py", line 696, in _get_record_name

  File "C:\Odoo10\server\odoo\addons\purchase\models\purchase.py", line 188, in name_get

  File "C:\Odoo10\server\odoo\tools\misc.py", line 1182, in formatLang

  File "C:\Odoo10\server\odoo\addons\base\res\res_lang.py", line 263, in format

UnicodeDecodeError: 'ascii' codec can't decode byte 0xa0 in position 2: ordinal not in range(128)

2018-10-12 06:45:22,401 3780 ERROR 123 odoo.http: Exception during JSON request handling.

Traceback (most recent call last):

  File "C:\Odoo10\server\odoo\http.py", line 642, in _handle_exception

  File "C:\Odoo10\server\odoo\addons\base\ir\ir_http.py", line 195, in _dispatch

  File "C:\Odoo10\server\odoo\http.py", line 700, in dispatch

  File "C:\Odoo10\server\odoo\http.py", line 662, in _handle_exception

  File "C:\Odoo10\server\odoo\http.py", line 630, in _json_response

  File "json\__init__.pyc", line 244, in dumps

  File "json\encoder.pyc", line 207, in encode

  File "json\encoder.pyc", line 270, in iterencode

UnicodeDecodeError: 'utf8' codec can't decode byte 0xa0 in position 2: invalid start byte

2018-10-12 06:45:22,457 3780 INFO 123 werkzeug: 10.10.15.1 - - [12/Oct/2018 06:45:22] "POST /web/dataset/call_kw/purchase.order/create HTTP/1.1" 500 -

2018-10-12 06:45:22,467 3780 ERROR 123 werkzeug: Error on request:

Traceback (most recent call last):

  File "werkzeug\serving.py", line 177, in run_wsgi

  File "werkzeug\serving.py", line 165, in execute

  File "C:\Odoo10\server\odoo\service\server.py", line 245, in app

    return self.app(e, s)

  File "C:\Odoo10\server\odoo\service\wsgi_server.py", line 186, in application

    return application_unproxied(environ, start_response)

  File "C:\Odoo10\server\odoo\service\wsgi_server.py", line 172, in application_unproxied

    result = handler(environ, start_response)

  File "C:\Odoo10\server\odoo\http.py", line 1326, in __call__

    return self.dispatch(environ, start_response)

  File "C:\Odoo10\server\odoo\http.py", line 1300, in __call__

    return self.app(environ, start_wrapped)

  File "werkzeug\wsgi.py", line 579, in __call__

  File "C:\Odoo10\server\odoo\http.py", line 1499, in dispatch

    result = ir_http._dispatch()

  File "C:\Odoo10\server\odoo\addons\web_editor\models\ir_http.py", line 21, in _dispatch

    return super(IrHttp, cls)._dispatch()

  File "C:\Odoo10\server\odoo\addons\base\ir\ir_http.py", line 199, in _dispatch

    return cls._handle_exception(e)

  File "C:\Odoo10\server\odoo\addons\base\ir\ir_http.py", line 169, in _handle_exception

    return request._handle_exception(exception)

  File "C:\Odoo10\server\odoo\http.py", line 662, in _handle_exception

    return self._json_response(error=error)

  File "C:\Odoo10\server\odoo\http.py", line 630, in _json_response

    body = json.dumps(response)

  File "json\__init__.py", line 244, in dumps

  File "json\encoder.py", line 207, in encode

  File "json\encoder.py", line 270, in iterencode

UnicodeDecodeError: 'utf8' codec can't decode byte 0xa0 in position 2: invalid start byte

2018-10-12 06:45:24,486 3780 INFO 123 werkzeug: 10.10.15.1 - - [12/Oct/2018 06:45:24] "POST /web/webclient/version_info HTTP/1.1" 200 -

you can check the log file for better understand