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NullReferenceException on ReadValue after update 5.80.324

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25 Aug 2024 12:04 #13055 by support
Replied by support on topic NullReferenceException on ReadValue after update 5.80.324
Hello,
yes, this is precisely what I needed.

The error turns out to be a consequence of a change in the underlying UA-.NETStandard library (5.80.324 references a new version of it, for security reasons).
Thank you very much for reporting it!

It is now fixed. Please rebuild with QuickOPC 5.80.347 or later: It is now on our Web site, and www.nuget.org .

Best regards

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23 Aug 2024 13:59 #13046 by Twoaster
Replied by Twoaster on topic NullReferenceException on ReadValue after update 5.80.324
Hi!
Sorry for that, I had to change my catch to (Exception ex) to be able to see the stackTrace.

Please let me know if this is the one you are looking for.
Code:
ex.InnerException.StackTrace at OpcLabs.EasyOpc.UA.Sdk.Extensions.BinaryDecoderExtension.SetStream(BinaryDecoder binaryDecoder, Stream stream) at OpcLabs.EasyOpc.UA.Sdk.Extensions.BinaryDecoderExtension.Detach(BinaryDecoder binaryDecoder) at OpcLabs.EasyOpc.UA.DataTypeModel.Implementation.UAOpcBinaryDataTypeDefinitionDecoder.Decode(UADataTypeInfo dataTypeInfo, String[] namespaceTable) at OpcLabs.EasyOpc.UA.DataTypeModel.Implementation.UAOpcBinaryDts.UncheckedDecodeFromStreamInDataTypeDefinitionModel(UADataTypeInfo dataTypeInfo, Stream stream, UAEndpointDescriptor endpointDescriptor, IUAServerTables serverTables, Boolean fixedLayout) at OpcLabs.EasyOpc.UA.DataTypeModel.Implementation.UAOpcBinaryDts.DecodeFromStreamInDataTypeDefinitionModel(UADataTypeInfo dataTypeInfo, Stream stream, UAEndpointDescriptor endpointDescriptor, IUAServerTables serverTables, Boolean fixedLayout) at OpcLabs.EasyOpc.UA.DataTypeModel.Implementation.UAOpcBinaryDts.DecodeInDataTypeDefinitionModel(UADataTypeInfo dataTypeInfo, Object objectBody, UAEndpointDescriptor endpointDescriptor, IUAServerTables serverTables, Boolean fixedLayout) at OpcLabs.EasyOpc.UA.ComplexData.Implementation.UAComplexDataConverter.<>c__DisplayClass5_0.<ConvertExtensionObjectsToGenericDataInDataTypeDefinitionModel>b__0(Int32 i) at System.Threading.Tasks.Parallel.<>c__DisplayClass19_0`2.<ForWorker>b__1(RangeWorker& currentWorker, Int64 timeout, Boolean& replicationDelegateYieldedBeforeCompletion) --- End of stack trace from previous location --- at System.Threading.Tasks.Parallel.<>c__DisplayClass19_0`2.<ForWorker>b__1(RangeWorker& currentWorker, Int64 timeout, Boolean& replicationDelegateYieldedBeforeCompletion) at System.Threading.Tasks.TaskReplicator.Replica.Execute()
The following user(s) said Thank You: support

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23 Aug 2024 06:11 #13043 by support
Replied by support on topic NullReferenceException on ReadValue after update 5.80.324
Hello,
thank you, I appreciate your effort. However, this appears to be the call stack of the outer AggregateException. Please obtain the call stack of the inner NullReferenceException.

Best regards

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22 Aug 2024 18:04 #13042 by Twoaster
Replied by Twoaster on topic NullReferenceException on ReadValue after update 5.80.324
Hi, the line throwing the exception is the follow:

genericObject = (UAGenericObject)_easyUAClient.ReadValue(endpointDescriptor, nodeDescriptor);

The details are bellow:
Code:
System.AggregateException HResult=0x80131500 Message=One or more errors occurred. (Object reference not set to an instance of an object.) Source=System.Threading.Tasks.Parallel StackTrace: at System.Threading.Tasks.TaskReplicator.Run[TState](ReplicatableUserAction`1 action, ParallelOptions options, Boolean stopOnFirstFailure) at System.Threading.Tasks.Parallel.ForWorker[TLocal,TInt](TInt fromInclusive, TInt toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally) --- End of stack trace from previous location --- at System.Threading.Tasks.Parallel.ForWorker[TLocal,TInt](TInt fromInclusive, TInt toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally) at System.Threading.Tasks.Parallel.For(Int32 fromInclusive, Int32 toExclusive, Action`1 body) at OpcLabs.EasyOpc.UA.ComplexData.Implementation.UAComplexDataConverter.ConvertExtensionObjectsToGenericDataInDataTypeDefinitionModel(IReadOnlyList`1 argumentsList) at OpcLabs.EasyOpc.UA.ComplexData.Implementation.UAComplexDataConverter.<>c__DisplayClass4_0.<ConvertExtensionObjectsToGenericData>b__8(IReadOnlyList`1 list2) at OpcLabs.BaseLib.Collections.Generic.Extensions.IReadOnlyListExtension.IfThenElse[TInput,TOutput](IReadOnlyList`1 readOnlyList, Predicate`1 condition, Func`2 thenListSelector, Func`2 elseListSelector) at OpcLabs.EasyOpc.UA.ComplexData.Implementation.UAComplexDataConverter.<>c__DisplayClass4_0.<ConvertExtensionObjectsToGenericData>b__4(IReadOnlyList`1 list) at OpcLabs.BaseLib.Collections.Generic.Extensions.IReadOnlyListExtension.IfThenElse[TInput,TOutput](IReadOnlyList`1 readOnlyList, Predicate`1 condition, Func`2 thenListSelector, Func`2 elseListSelector) at OpcLabs.EasyOpc.UA.ComplexData.Implementation.UAComplexDataConverter.ConvertExtensionObjectsToGenericData(IReadOnlyList`1 convertExtensionObjectArgumentsList, UAComplexDataParameters complexDataParameters) at OpcLabs.EasyOpc.UA.ComplexData.Implementation.UAComplexDataConverter.<>c__DisplayClass2_0.<ConvertExtensionObjectsToGenericObjects>b__6(IReadOnlyList`1 list) at OpcLabs.BaseLib.Collections.Generic.Extensions.IReadOnlyListExtension.IfThenElse[TInput,TOutput](IReadOnlyList`1 readOnlyList, Predicate`1 condition, Func`2 thenListSelector, Func`2 elseListSelector) at OpcLabs.EasyOpc.UA.ComplexData.Implementation.UAComplexDataConverter.ConvertExtensionObjectsToGenericObjects(IReadOnlyList`1 convertExtensionObjectInfoList, UAComplexDataParameters complexDataParameters) at OpcLabs.EasyOpc.UA.Plugins.ComplexData.Implementation.ComplexDataEasyUAClient.ConvertExtensionObjectsToGenericObjects(IReadOnlyList`1 convertExtensionObjectInfoList) at OpcLabs.EasyOpc.UA.Plugins.ComplexData.Implementation.ComplexDataEasyUAClient.<ConvertValueElements>b__6_3(IReadOnlyList`1 list) at OpcLabs.BaseLib.Collections.Generic.Extensions.IReadOnlyListExtension.IfThenElse[TInput,TOutput](IReadOnlyList`1 readOnlyList, Predicate`1 condition, Func`2 thenListSelector, Func`2 elseListSelector) at OpcLabs.EasyOpc.UA.Plugins.ComplexData.Implementation.ComplexDataEasyUAClient.ConvertValueElements(IReadOnlyList`1 convertValueArgumentsList) at OpcLabs.EasyOpc.UA.UAUtilities.ConvertValuesUsing(IReadOnlyList`1 convertValueArgumentsList, Func`2 convertElementsFunction, Func`3 arrayNeedsElementConversionFunction, Func`3 newArrayElementTypeFunction, Boolean convertingBack) at OpcLabs.EasyOpc.UA.Implementation.DataConvertingEasyUAClient.ConvertValuesUsing(IReadOnlyList`1 convertValueArgumentsList, Func`2 convertElementsFunction, Boolean convertingBack) at OpcLabs.EasyOpc.UA.Implementation.DataConvertingEasyUAClient.ConvertValues(IReadOnlyList`1 convertValueArgumentsList) at OpcLabs.EasyOpc.UA.Implementation.DataConvertingEasyUAClient.<>c__DisplayClass1_0.<ConvertAttributeDataUsing>b__4(IReadOnlyList`1 list) at OpcLabs.BaseLib.Collections.Generic.Extensions.IReadOnlyListExtension.IfThenElse[TInput,TOutput](IReadOnlyList`1 readOnlyList, Predicate`1 condition, Func`2 thenListSelector, Func`2 elseListSelector) at OpcLabs.EasyOpc.UA.Implementation.DataConvertingEasyUAClient.ConvertAttributeDataUsing(IReadOnlyList`1 convertInfoList, Func`2 convertValuesFunction) at OpcLabs.EasyOpc.UA.Implementation.DataConvertingEasyUAClient.ConvertAttributeData(IReadOnlyList`1 convertInfoList) at OpcLabs.EasyOpc.UA.Implementation.DataConvertingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.ForwardingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Optimization.Implementation.RequestMergingEasyUAClient.<ReadMultiple>b__2_0(UAReadArguments[] array) at OpcLabs.BaseLib.OperationModel.Extensions.IReadOnlyListOfOperationArgumentsExtension.MergingPerform[TArguments,TResult](IReadOnlyList`1 argumentsList, Func`2 arrayOperationFunction) at OpcLabs.EasyOpc.UA.Optimization.Implementation.RequestMergingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.ForwardingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.DelegatingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.LicensingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.MultiplexingEasyUAClient.<>c.<ReadMultiple>b__18_0(IEasyUAClient client, IReadOnlyList`1 list) at OpcLabs.BaseLib.Collections.Generic.Extensions.IReadOnlyListExtension.SwitchCase[TInput,TOutput,TKey](IReadOnlyList`1 readOnlyList, Func`2 keySelector, IEqualityComparer`1 keyComparer, Func`3 outputSelector) at OpcLabs.EasyOpc.UA.Implementation.MultiplexingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.ForwardingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.ForwardingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.Implementation.DelegatingEasyUAClient.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.EasyUAClientCore.ReadMultiple(UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.IEasyUAClientExtension.ReadMultipleValues(IEasyUAClient client, UAReadArguments[] readArgumentsArray) at OpcLabs.EasyOpc.UA.IEasyUAClientExtension.ReadValue(IEasyUAClient client, UAReadArguments readArguments) at OpcLabs.EasyOpc.UA.IEasyUAClientExtension.ReadValue(IEasyUAClient client, UAEndpointDescriptor endpointDescriptor, UANodeDescriptor nodeDescriptor) at Test.CleanArch.Infrastructure.PLC.OpcCommunication.WriteClass(String machineIp, String machineType, MachineData opcVariable, String JSONData) in C:\Users\joao\git\VSOS\src\Test.CleanArch.Infrastructure\PLC\OpcCommunication.cs:line 208 at Test.CleanArch.UseCases.MachineDataRepo.PlcWrite(String machineIp, String machineType, MachineData updatedData, String JsonData) in C:\Users\joao\git\VSOS\src\Test.CleanArch.UseCases\MachineDataRepo.cs:line 167 at Test.CleanArch.UseCases.VLM.MachineSettings.StartupPlcSettingsUseCase.Execute(String IP) in C:\Users\joao\git\VSOS\src\Test.CleanArch.UseCases\VLM\MachineSettings\StartupPlcSettingsUseCase.cs:line 53 at Test.CleanArch.Blazor.Components.Layout.AlarmStrip.OnInitialized() in C:\Users\joao\git\VSOS\src\Test.CleanArch.Blazor\Components\Layout\AlarmStrip.razor:line 53 at Microsoft.AspNetCore.Components.ComponentBase.<RunInitAndSetParametersAsync>d__21.MoveNext() This exception was originally thrown at this call stack: [External Code] Inner Exception 1: NullReferenceException: Object reference not set to an instance of an object.

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22 Aug 2024 15:33 #13041 by support
Replied by support on topic NullReferenceException on ReadValue after update 5.80.324
Hello.

It is not clear which line of code you mean, but I suppose it is the one with the ReadValue call, is that correct?

Please provide the stack trace of the (inner) NullReferenceException.

Best regards

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22 Aug 2024 15:11 #13040 by Twoaster
NullReferenceException on ReadValue after update 5.80.324 was created by Twoaster
Hi!
I have a C# project and my code was working with no errors or issues until I updated it to the latest version 5.80.324.
Previously I was using 5.80.277.

I'm getting this error on the line of the ReadValue call.
Code:
System.AggregateException: 'One or more errors occurred. (Object reference not set to an instance of an object.)' Inner Exception NullReferenceException: Object reference not set to an instance of an object.
Code:
IEasyUAClient _easyUAClient; ... //On my constructor (I suppressed part of the code here) _easyUAClient = new EasyUAClient(); this._easyUAClient = easyUAClient; ... public Result Write(string Ip, string machineType, MachineData opcVariable, string JSONData) { UAEndpointDescriptor endpointDescriptor = $"{Suppressed_Descriptor}"; UANodeDescriptor nodeDescriptor = $"{Suppressed_Descriptor}"; UAGenericObject genericObject = new UAGenericObject(); try { genericObject = (UAGenericObject)_easyUAClient.ReadValue(endpointDescriptor, nodeDescriptor); } catch (UAException ex) { _logger.LogError("Read OPC Value error {ex}", ex); return Result.Error(ex.Message); } }

Did something changed on the new version that I'm not considering on this code?
Thanks!

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