Hi,

The customer just informed us that he is able to browse DeltaV OPC items. Thank you for your great support!

Michael

Hi,

Thank you. We have installed this latest version 5.82.423 and created a new build. It was sent to the customer and now we are waiting for the customer's answer.

Regards,

Michael

Hello,
thank you for the answers. I cannot see anything in your code that could be causing this.

It would be easy to find the cause if we had a reproducible scenario here. Without it, we have spent quite a time trying to find possible cause, but to no avail.
This said, there is a possible "patch" that can be done, which does not resolve the (so far unknown) root cause, but should fix the problem nevertheless. We have implemented this patch in the new build of QuickOPC 2025.1, which is 5.82.423.

Please update to this latest version and rebuild your software.

Best regards
 

Hi,

Please see our browsing function below.

1. I don't see any manipulation of the ServerCategories.

2. The ServerDescriptor property is under the DataItemDialog1 object. See the code below.

3. Does your code construct the ServerCategories object anywhere?  - No.

4. Does your code construct the ServerElement object anywhere? The only part the references the ServerElement is below when browsing for OPC Servers:

    Private Sub ButtonBrowseServers_Click_1(sender As Object, e As EventArgs) Handles ButtonBrowseServers.Click
        Dim OPC_ServerName As String
        Dim ComputerDesc As String

        If OpcComputerAndServerDialog1.ShowDialog() = DialogResult.OK Then
            ComputerDesc = OpcComputerAndServerDialog1.ComputerElement.ToString
            OPC_ServerName = OpcComputerAndServerDialog1.ServerElement.ServerClass ' OpcComputerAndServerDialog1.ServerDescriptor.ToString
            OPCServerName.Text = OPC_ServerName
            ComputerName.Text = ComputerDesc
            OPC_CLSID.Text = OpcComputerAndServerDialog1.ServerDescriptor.ClsidString
        End If
    End Sub

'

---

Friend WithEvents DaItemDialog1 As New OpcLabs.EasyOpc.DataAccess.Forms.Browsing.DAItemDialog

 Public Function GlobalTagBrowseDA(lMyServer As String) As String
        Dim TagName As String = ""
        Dim server_properties As OPC_servers_data
        Dim easyDAClient = New EasyDAClient()

        If (lMyServer.Length > 0) Then
            If gNET_API Then ' .NET API Client - Dec-1-2022 V2020.6 b617
                easyDAClient.InstanceParameters.EnableNetApiClient = True ' Dec-1-2022 V2020.6 b617
                easyDAClient.InstanceParameters.EnableNativeClient = False ' Dec-29-2021 V2020.4 b401
            Else ' Native API Client
                easyDAClient.InstanceParameters.EnableNetApiClient = False ' Dec-1-2022 V2020.6 b617
                easyDAClient.InstanceParameters.EnableNativeClient = True ' Dec-29-2021 V2020.4 b401
            End If
            server_properties = GetServerPropertiesByServerName(lMyServer)
            If (server_properties.Server_name.Length > 0) Then
                DaItemDialog1.ServerDescriptor.MachineName = server_properties.server_comp_name
                DaItemDialog1.ServerDescriptor.ServerClass = server_properties.RealServerName
                If DaItemDialog1.ShowDialog() = DialogResult.OK Then
                    TagName = DaItemDialog1.NodeElement.ItemId
                    'Dim varType As VarType = easyDAClient.GetDataTypePropertyValue("", "OPCLabs.KitServer.2", "Simulation.Random")
                    Dim value As Object = Nothing
                    Dim exception As Exception = Nothing
                    Try  ' Catch the exception May-29-2017
                        value = easyDAClient.GetDataTypePropertyValue(server_properties.server_comp_name, server_properties.RealServerName, TagName)
                    Catch ex As OpcException
                        exception = ex
                        sTagType = ""
                        DisplayOPCException(exception, server_properties, TagName) ' Feb-17-2022 b404 - display the exception
                    End Try
                    If (value IsNot Nothing) Then
                        If value.NumericalValue = 8 Then ' String
                            sTagType = "String"
                        Else
                            sTagType = "Numeric"
                        End If
                    End If
                End If
                DaItemDialog1.Reset()
            Else
                MsgBox("Invalid CLSID!", vbExclamation, "Error")
            End If
        Else
            MsgBox("Select an OPC server first.", vbExclamation, "Info")
        End If
        GlobalTagBrowseDA = TagName
    End Function


Thank you.

Michael

Hello,
I have some additional questions:

1. Does your code somehow set or manipulate the .ServerCategories property that is in the ServerDescriptor that is passed to the OPC item browsing dialog?
2. Where does the ServerDescriptor passed to the OPC item browsing dialog come from? (for example, is it constructed manually from ProgId entered by the user, or does it come from the selection in the OPC Server browsing dialog?) Can you share the pieces of code that illustrates the origins of this value and how it gets to the OPC item browsing dialog?
3. Does your code construct the ServerCategories object anywhere? (something like "New ServerCategories")?
4. Does your code construct the ServerElement object anywhere? (something like "New ServerElement")?

Thank you, and regards
 

Thank you, this has helped. We now have more information to analyse the issue. As I wrote, the update was not meant to resolve the issue. I will let you know here what the outcome is.

Best regards

Hi,

I have sent the new version that was built with the latest version of the Nuget version(5.82.395.1). The customer installed the new version but the problem persists. See the error below.

I appreciate your support..

Thank you.

Michael

Exceptions

Type: System.NotSupportedException
Data: ErrorId_{045406CD-8EEA-4F21-B3D6-DC9DB5A34E58}: OpcLabs.{6468EA80}
HelpLink: 
HResult: -2146233088 (0x80131500)
InnerException:
    System.NotSupportedException: The appropriate interface was not recognized for the allowed OPCDataAccess.
    
    The COM server supports the following interfaces:
    OpcRcw.Da.IOPCBrowse (DA30): False
    OpcRcw.Da.IOPCItemIO (DA30): ??
    OpcRcw.Da.IOPCItemProperties (DA20): True
    OpcRcw.Da.IOPCServer (DAxx): True
    
    ServerCategories.OpcDataAccess30: False
    ServerCategories.OpcDataAccess20: False
    ServerCategories.OpcDataAccess10: False
    
    This problem could be caused by:
    - incorrectly installed proxy/stubs.
    - problems with the DCOM security settings.
    - a personal firewall (sometimes activated by default).
    
    + The client method called (or event/callback invoked) was 'BrowseNodes'.
       at OpcLabs.EasyOpc.Implementation.NetApi.NetApiOpcServer`2.ConnectToServer(WebProxy proxy, Server server, NetworkCredential credentials, String connectionGroupName, EasyClientConnectDataParameters easyClientConnectDataParameters, ServerCategories serverCategories)
       at OpcLabs.EasyOpc.Implementation.NetApi.NetApiOpcServer`2.Connect(Boolean doOnlyIfGoodStatus, Boolean callGetStatus, Exception& exception)
    Data:
        OpcLabs.EasyOpc.Implementation.NetApi.NetApiErrorHarmonization.Processed: True
        OpcLabs.EasyOpc.Implementation.ClientErrorEnhancement.Processed: True
        OpcLabs.EasyOpc.Implementation.DAClientErrorEnhancement.Processed: True
    HelpLink: 
    HResult: -2146233067 (0x80131515)
    InnerException: 
    Message:
        The appropriate interface was not recognized for the allowed OPCDataAccess.
        
        The COM server supports the following interfaces:
        OpcRcw.Da.IOPCBrowse (DA30): False
        OpcRcw.Da.IOPCItemIO (DA30): ??
        OpcRcw.Da.IOPCItemProperties (DA20): True
        OpcRcw.Da.IOPCServer (DAxx): True
        
        ServerCategories.OpcDataAccess30: False
        ServerCategories.OpcDataAccess20: False
        ServerCategories.OpcDataAccess10: False
        
        This problem could be caused by:
        - incorrectly installed proxy/stubs.
        - problems with the DCOM security settings.
        - a personal firewall (sometimes activated by default).
        
        + The client method called (or event/callback invoked) was 'BrowseNodes'.
    Source: OpcLabs.EasyOpcClassic
    StackTrace:
           at OpcLabs.EasyOpc.Implementation.NetApi.NetApiOpcServer`2.ConnectToServer(WebProxy proxy, Server server, NetworkCredential credentials, String connectionGroupName, EasyClientConnectDataParameters easyClientConnectDataParameters, ServerCategories serverCategories)
           at OpcLabs.EasyOpc.Implementation.NetApi.NetApiOpcServer`2.Connect(Boolean doOnlyIfGoodStatus, Boolean callGetStatus, Exception& exception)
    TargetSite: Void ConnectToServer(System.Net.WebProxy, Opc.Server, System.Net.NetworkCredential, System.String, OpcLabs.EasyOpc.Implementation.NetApi.EasyClientConnectDataParameters, OpcLabs.EasyOpc.ServerCategories)
        DeclaringType: OpcLabs.EasyOpc.Implementation.NetApi.NetApiOpcServer`2[TNetApiOpcServer,TServer]
        Module: OpcLabs.EasyOpcClassic.dll
            Assembly: OpcLabs.EasyOpcClassic, Version=5.82.395.1, Culture=neutral, PublicKeyToken=6faddca41dacb409
            CustomAttributes: 
            FullyQualifiedName: C:\Program Files (x86)\Control-See\UCME-OPC\BIN\OpcLabs.EasyOpcClassic.dll
            MDStreamVersion: 131072
            MetadataToken: 1
            ModuleHandle: System.ModuleHandle
                MDStreamVersion: 131072
            ModuleVersionId: 9ceb428c-1a0c-481d-9508-b4e0990afd97
            Name: OpcLabs.EasyOpcClassic.dll
            ScopeName: OpcLabs.EasyOpcClassic.dll
Message: Problem browsing OPC Data Access (OPC-DA) branches.
Source: 
StackTrace: 
TargetSite: 
 

Thank you for letting me know.

I also wanted to verify that you take over the configuration file (generated by Visual Studio), named <your program name>.exe.config. It contains the assembly version binding redirections, so it is critical that it is included with the assemblies.

Regards


 

Hi,

The problem is solved. I probably missed a few DLLs in my setup.

Thank you for your help.

Michael

Hi,

My program runs fine (in Release mode) inside Visual Studio. I compared all DLL files in the Release folder and in my Bin folder and they are the same. See the attached text file.

 

Any idea how to solve?

Thank you.

Michael