KPOpcUa.dll – Linux with Mono Error

[chrisn]

Hi Everyone,

We are doing a deploy which includes a Linux server (CentOS 8) running Mono and utilising OPC UA for connection to our PLCs. The configuration works perfectly on our Windows environment, but on shifting to the Linux config the OPC connections just seem to timeout and error. There is no error in the ScadaComm log other than the KPOPC.DLL having an issue with a dependancy which I believe would be expected as I believe this is for OPC DA. The KP OPC UA DLL loads without error.

Has anyone experience with OPC UA under Linux?

[Mikhail]

Hi,

We tested KpOpcUa.dll driver on Debian family. Could you copy a particular error message or provide screenshots?

[kumajaya]

Error on Ubuntu 20.04:
2020-07-09 14:44:00 Communication session with the Device 1002 “OPC UA 02”, type: KpOpcUa
Error connecting OPC server: System.AggregateException: One or more errors occurred. (Cannot access certificate private key. Subject=CN=KpOpcUa, O=OPC Foundation, DC=weighing-tx1310-m3) —> Opc.Ua.ServiceResultException: Cannot access certificate private key. Subject=CN=KpOpcUa, O=OPC Foundation, DC=weighing-tx1310-m3
at Opc.Ua.Configuration.ApplicationInstance.CheckApplicationInstanceCertificate (System.Boolean silent, System.UInt16 minimumKeySize, System.UInt16 lifeTimeInMonths) [0x0028d] in <257f0400988e4a10b271f6f92984b904>:0
at Scada.Comm.Devices.OpcUa.OpcUaHelper.ConnectAsync (Scada.Comm.Devices.OpcUa.Config.ConnectionOptions connectionOptions, System.Int32 operationTimeout) [0x00138] in <39294643693b45b3b8e6300c5758da94>:0
— End of inner exception stack trace —
at System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) [0x00011] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Threading.Tasks.Task`
1[TResult].GetResultCore (System.Boolean waitCompletionNotification) [0x0002b] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Threading.Tasks.Task`1[TResult].get_Result () [0x0000f] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at Scada.Comm.Devices.KpOpcUaLogic.ConnectToOpcServer () [0x00051] in <39294643693b45b3b8e6300c5758da94>:0
—> (Inner Exception #0) Opc.Ua.ServiceResultException: Cannot access certificate private key. Subject=CN=KpOpcUa, O=OPC Foundation, DC=weighing-tx1310-m3
at Opc.Ua.Configuration.ApplicationInstance.CheckApplicationInstanceCertificate (System.Boolean silent, System.UInt16 minimumKeySize, System.UInt16 lifeTimeInMonths) [0x0028d] in <257f0400988e4a10b271f6f92984b904>:0
at Scada.Comm.Devices.OpcUa.OpcUaHelper.ConnectAsync (Scada.Comm.Devices.OpcUa.Config.ConnectionOptions connectionOptions, System.Int32 operationTimeout) [0x00138] in <39294643693b45b3b8e6300c5758da94>:0 <—

• This reply was modified 3 years, 9 months ago by kumajaya.

[kumajaya]

Copy KpOpcUa.Linux.xml as KpOpcUa.Logic.xml but replace all ‘%LocalApplicationData%’ string with ‘%CommonApplicationData%’ solve above problem but now I got:

Error connecting OPC server: System.AggregateException: One or more errors occurred. (The type initializer for ‘Opc.Ua.ServiceMessageContext’ threw an exception.) —> System.TypeInitializationException: The type initializer for ‘Opc.Ua.ServiceMessageContext’ threw an exception. —> System.TypeInitializationException: The type initializer for ‘Opc.Ua.EncodeableFactory’ threw an exception. —> System.TypeLoadException: Could not load type of field ‘Opc.Ua.JsonDecoder:m_reader’ (0) due to: Could not load file or assembly ‘Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed’ or one of its dependencies.
at (wrapper managed-to-native) System.RuntimeTypeHandle.type_is_assignable_from(System.Type,System.Type)
at System.RuntimeTypeHandle.CanCastTo (System.RuntimeType type, System.RuntimeType target) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.RuntimeType.IsAssignableFrom (System.Type c) [0x00020] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.RuntimeType.IsAssignableFrom (System.Reflection.TypeInfo typeInfo) [0x00012] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at Opc.Ua.EncodeableFactory.AddEncodeableType (System.Type systemType) [0x00034] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.EncodeableFactory.AddEncodeableTypes (System.Reflection.Assembly assembly) [0x00034] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.EncodeableFactory..ctor () [0x0002d] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.EncodeableFactory..cctor () [0x00000] in <46754062c86e433a8050147004074236>:0
— End of inner exception stack trace —
at Opc.Ua.ServiceMessageContext..ctor () [0x00053] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.ServiceMessageContext..ctor (System.Boolean shared) [0x00000] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.ServiceMessageContext..cctor () [0x00000] in <46754062c86e433a8050147004074236>:0
— End of inner exception stack trace —
at Opc.Ua.DiscoveryClient.Create (System.Uri discoveryUrl, Opc.Ua.EndpointConfiguration configuration) [0x0000a] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.Client.CoreClientUtils.SelectEndpoint (System.String discoveryUrl, System.Boolean useSecurity, System.Int32 operationTimeout) [0x00041] in <bdddc5532da84081a96bd9e7feb3ef1e>:0
at Scada.Comm.Devices.OpcUa.OpcUaHelper.ConnectAsync (Scada.Comm.Devices.OpcUa.Config.ConnectionOptions connectionOptions, System.Int32 operationTimeout) [0x001e9] in <39294643693b45b3b8e6300c5758da94>:0
— End of inner exception stack trace —
at System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) [0x00011] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Threading.Tasks.Task`1[TResult].GetResultCore (System.Boolean waitCompletionNotification) [0x0002b] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Threading.Tasks.Task`1[TResult].get_Result () [0x0000f] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at Scada.Comm.Devices.KpOpcUaLogic.ConnectToOpcServer () [0x00051] in <39294643693b45b3b8e6300c5758da94>:0
—> (Inner Exception #0) System.TypeInitializationException: The type initializer for ‘Opc.Ua.ServiceMessageContext’ threw an exception. —> System.TypeInitializationException: The type initializer for ‘Opc.Ua.EncodeableFactory’ threw an exception. —> System.TypeLoadException: Could not load type of field ‘Opc.Ua.JsonDecoder:m_reader’ (0) due to: Could not load file or assembly ‘Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed’ or one of its dependencies.
at (wrapper managed-to-native) System.RuntimeTypeHandle.type_is_assignable_from(System.Type,System.Type)
at System.RuntimeTypeHandle.CanCastTo (System.RuntimeType type, System.RuntimeType target) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.RuntimeType.IsAssignableFrom (System.Type c) [0x00020] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.RuntimeType.IsAssignableFrom (System.Reflection.TypeInfo typeInfo) [0x00012] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at Opc.Ua.EncodeableFactory.AddEncodeableType (System.Type systemType) [0x00034] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.EncodeableFactory.AddEncodeableTypes (System.Reflection.Assembly assembly) [0x00034] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.EncodeableFactory..ctor () [0x0002d] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.EncodeableFactory..cctor () [0x00000] in <46754062c86e433a8050147004074236>:0
— End of inner exception stack trace —
at Opc.Ua.ServiceMessageContext..ctor () [0x00053] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.ServiceMessageContext..ctor (System.Boolean shared) [0x00000] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.ServiceMessageContext..cctor () [0x00000] in <46754062c86e433a8050147004074236>:0
— End of inner exception stack trace —
at Opc.Ua.DiscoveryClient.Create (System.Uri discoveryUrl, Opc.Ua.EndpointConfiguration configuration) [0x0000a] in <46754062c86e433a8050147004074236>:0
at Opc.Ua.Client.CoreClientUtils.SelectEndpoint (System.String discoveryUrl, System.Boolean useSecurity, System.Int32 operationTimeout) [0x00041] in <bdddc5532da84081a96bd9e7feb3ef1e>:0
at Scada.Comm.Devices.OpcUa.OpcUaHelper.ConnectAsync (Scada.Comm.Devices.OpcUa.Config.ConnectionOptions connectionOptions, System.Int32 operationTimeout) [0x001e9] in <39294643693b45b3b8e6300c5758da94>:0 <—

[Mikhail]

Try this file.
You should create directories:
/opt/scada/OPC Foundation/pki/app
/opt/scada/OPC Foundation/pki/issuer
/opt/scada/OPC Foundation/pki/trusted
/opt/scada/OPC Foundation/pki/rejected
/opt/scada/OPC Foundation/pki/issuerUser
/opt/scada/OPC Foundation/pki/trustedUser
and provide write access for them.

[Mikhail]

What is Mono version?

[kumajaya]

I managed to fix self signed certificate generation by changing ‘%LocalApplicationData%’ to ‘%CommonApplicationData%’. Certificate saved inside ‘/usr/share/OPC Foundation/’.

[kumajaya]

Mono version 6.10.0.104, Ubuntu 20.04 https://www.mono-project.com/download/preview/#download-lin-ubuntu

[kumajaya]

But OPCUA still doesn’t work with “Could not load file or assembly ‘Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed’ or one of its dependencies” error.

[Mikhail]

Try downloading Newtonsoft.Json from NuGet and copy to /opt/scada/ScadaComm/KP
You need Newtonsoft.Json version >= 10.0.3
Does it help?

Probably Mono on my Linux computer already contains it somehow.

[Mikhail]

OPC UA dlls depend on Newtonsoft.Json. See this for the details.

[kumajaya]

Official release have a lot of target framework inside https://github.com/JamesNK/Newtonsoft.Json/releases Which one should I choose?

[kumajaya]

Now I got “Could not load file or assembly ‘Microsoft.AspNetCore.Hosting.Abstractions, Version=1.1.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60’ or one of its dependencies.” Installing https://docs.microsoft.com/en-us/dotnet/core/install/linux-ubuntu still not solve the problem, maybe because older OPCUA library expect older version .NET core

[kumajaya]

Newtonsoft.Json.dll release 10.0.3 for net45 target from https://github.com/JamesNK/Newtonsoft.Json/releases/download/10.0.3/Json100r3.zip and Microsoft.AspNetCore.Hosting.Abstractions.dll from dotnet-sdk-2.1 https://docs.microsoft.com/en-us/dotnet/core/install/linux-ubuntu#scripted-install fix the problem. Big thanks!

[kumajaya]

I confirm also work with latest version of https://www.nuget.org/packages/Newtonsoft.Json/ and https://www.nuget.org/packages/Microsoft.AspNetCore.Hosting.Abstractions/

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