okyame

Hi Do you find a solution for this issue ?

Okey. Damage !

I have the same issue, I think it's because at line https://github.com/FreeOpcUa/python-opcua/blob/7e3140e6269be97e1a8c25802b0c913f0aace585/opcua/client/client.py#L63 this function doesn't manage to renew the connection.

We have this comment on this function : https://github.com/FreeOpcUa/python-opcua/blob/7e3140e6269be97e1a8c25802b0c913f0aace585/opcua/client/ua_client.py#L180 ``` def open_secure_channel(self, params): self.logger.info("open_secure_channel") request = ua.OpenSecureChannelRequest() request.Parameters = params future = self._send_request(request, message_type=ua.MessageType.SecureOpen) # FIXME: we have a race...

I have this variables values before and after `renew`: In function https://github.com/FreeOpcUa/python-opcua/blob/7e3140e6269be97e1a8c25802b0c913f0aace585/opcua/client/client.py#L295 BEFORE RENEW ``` =>params value: OpenSecureChannelParameters(ClientProtocolVersion:0, RequestType:SecurityTokenRequestType.Issue, SecurityMode:MessageSecurityMode.SignAndEncrypt, ClientNonce:b'\xf4~>\x03\xa6\x97xx#\xf8\xbd\x1f\xac\x88\xc4\x17R\x17\x9d\xc3{\xa1\xfb\xc51\xa1\x14A\\\xa6{c', RequestedLifetime:3600000) =>nonce value: b'\xf4~>\x03\xa6\x97xx#\xf8\xbd\x1f\xac\x88\xc4\x17R\x17\x9d\xc3{\xa1\xfb\xc51\xa1\x14A\\\xa6{c' =>Result value: OpenSecureChannelResult(ServerProtocolVersion:0, SecurityToken:ChannelSecurityToken(ChannelId:30, TokenId:14,...

I notice that the client nonce, the server nonce and the TokenId are different.

And after the renew, client can't contact the server anymore.

The "try" block is called. As I already said: the "self.client.open_secure_channel(renew=True)" function doesn't work fine.