client.WriteValue(endpointDescriptor, nodeDescriptor, attributeData);

client.WriteValue(endpointDescriptor, nodeDescriptor, uaGenericObject);

static void Main(string[] args){ UAEndpointDescriptor endpointDescriptor = "opc.tcp://localhost:48030/"; UANodeDescriptor nodeDescriptor = "ns=2;i=6009"; using(var client = new EasyUAClient()){ try{ var attributeData = client.Read(endpointDescriptor, nodeDescriptor); if(attributeData?.Value is UAGenericObject uaGenericObject){ var fieldData = (((StructuredData)uaGenericObject.GenericData)?.FieldData); if(fieldData == null){ return; } var batchCode = ((PrimitiveData)fieldData["BatchCode"]).Value; var bundleCode = ((PrimitiveData)fieldData["BundleCode"]).Value; var boardCount = ((PrimitiveData)fieldData["BoardCount"]).Value; var boardLength = ((PrimitiveData)fieldData["BoardLength"]).Value; var boardWidth = ((PrimitiveData)fieldData["BoardWidth"]).Value; var boardThickness = ((PrimitiveData)fieldData["BoardThickness"]).Value; //((PrimitiveData)fieldData["BoardCount"]).Value = 123; //client.Write(endpointDescriptor, nodeDescriptor, attributeData); client.WriteValue(endpointDescriptor, nodeDescriptor, attributeData); } } catch(UAException uaException){ Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message); } } }

Exception: An OPC-UA operation failure with error ID 'Opc.UA.ServiceResult=0x80730000' occurred, originating from 'OpcLabs.EasyOpcUA' and with depth of 1. The inner OPC-UA service exception with service result 'BadWriteNotSupported' contains details about the problem. InnerException: OPC UA service result - {BadWriteNotSupported}. The server does not support writing the combination of value, status and timestamps provided. + A list of parts provided (or not provided) to the Write operation follows. Value: yes, index range: no, source timestamp: yes, server timestamp: yes. + When writing, be aware that writing the server timestamp (in this call, 17/08/2021 18:38:28) is not supported by some servers, including the OPC Foundation sample server. + The node descriptor used was: NodeId="ns=2;i=6009". + The client method called (or event/callback invoked) was 'WriteMultiple'.