https://forge.codesys.com/forge/talk/Engineering/thread/28a3aa676b/2021-02-05T14:17:19.041000ZRecent posts to OPC-UA errors in log, how do I interpret the error codes?2021-02-05T14:17:19.041000Z2021-02-05T14:17:19.041000Zi-campbellhttps://forge.codesys.com/u/i-campbell/https://forge.codesys.com348f152aa199474171ea2ef93dd78e55ca209f4c

<div class="markdown_content"><p>If it is unencrypted then wireshark is useful for showing which request caused it to fall over.</p></div>

2021-02-05T14:15:38.237000Z2021-02-05T14:15:38.237000Zi-campbellhttps://forge.codesys.com/u/i-campbell/https://forge.codesys.com4e1f30e62ba884572bb04fcf0c9551734f52d163

<div class="markdown_content"><p>They are defined by the standard, so I usually just Google for OPC UA 0x80010000</p></div>

2021-02-05T12:29:12.644000Z2021-02-05T12:29:12.644000ZMadsKaizerhttps://forge.codesys.com/u/madskaizer/https://forge.codesys.com2d25199e07faea5b957866e5c61ea9ad4602c363

<div class="markdown_content"><p>I got a Codesys 3.5.16.20 runtime on a PLC communicating with a SCADA platform.</p> <p>We keep loosing connection to the PLC and the PLC log inside Codesys IDE has a lot of the following lines</p> <p>warning: CmpOPCUAStack, 05-02-2021 10:01:58 - OpcUa_TcpListener_ReadEventHandler: Process Request returned an error (0x800B0000)!<br/> error: CmpOPCUAStack, 05-02-2021 10:01:58 - OpcUa_SecureListener_ProcessRequest: Closing channel due error 0x800B0000!<br/> error: CmpOPCUAStack, 05-02-2021 10:01:58 - OpcUa_Endpoint_BeginProcessRequest: Not able to create/send response. (0x800B0000)</p> <p>or</p> <p>warning: CmpOPCUAStack, 05-02-2021 09:30:09 - OpcUa_TcpStream_Flush: Error writing to socket: 0x80B50000!<br/> warning: CmpOPCUAStack, 05-02-2021 09:30:09 - OpcUa_TcpStream_Flush: Error writing to socket: 0x80B50000!</p> <p>or</p> <p>warning: CmpOPCUAStack, 04-02-2021 10:40:31 - OpcUa_SecureStream_Flush: Flush 0 failed with 0x80AD0000! (Last)<br/> warning: CmpOPCUAStack, 04-02-2021 10:40:31 - OpcUa_SecureStream_Flush: Could not flush transport stream! Status 0x80AD0000!<br/> warning: CmpOPCUAStack, 04-02-2021 10:40:31 - OpcUa_TcpStream_Flush: Error writing to socket: 0x80010000!</p> <p>But where can I find out what the hex error codes mean?</p></div>