Online Forums

Technical support is provided through Support Forums below. Anybody can view them; you need to Register/Login to our site (see links in upper right corner) in order to Post questions. You do not have to be a licensed user of our product.

Please read Rules for forum posts before reporting your issue or asking a question. OPC Labs team is actively monitoring the forums, and replies as soon as possible. Various technical information can also be found in our Knowledge Base. For your convenience, we have also assembled a Frequently Asked Questions page.

Do not use the Contact page for technical issues.

UA Read Value Internal Error

Start
Prev
1
Next
End

1

support
Offline
Moderator

More

24 Feb 2020 16:49 #8242 by support

Replied by support on topic UA Read Value Internal Error

Hello,

I have some questions, in order to narrow the problem down:

1. What type is of project? (such as Windows Forms app, WPF app, console app, ASP.NET Web app, Windows Service, Web service etc.).
2. Which QuickOPC version are you using?
3. Are there other OPC operation in your program that work well - or is this basically the first you do in the program, and it fails.
4. When you open the solution with VB.NET examples delivered with QuickOPC and run them (such as the UADocExamples project), do they work or not?
5. Can you please modify the code to also show the .InnerException property of the exception object you are catching, and le tme know what the InnerException is?

Thank you

Please Log in or Create an account to join the conversation.

ncooley
Topic Author
Offline
Junior Member

More

24 Feb 2020 15:23 - 24 Feb 2020 16:44 #8241 by ncooley

UA Read Value Internal Error was created by ncooley

Hi

I am using the following snippet of code;

            Dim attributeData As UAAttributeData
            Try
                attributeData = EasyUAClient1.Read(EndpointDescriptor, "nsu = http : //www.rockwellautomation.com/OpcUa ;ns=3;s=[J37]Secondary_Codes[1]")
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

but I am getting a exception error;

System.TypeLoadException: 'Could not load type 'Opc.Ua.KeyValuePair' from assembly 'Opc.Ua.Core, Version=1.3.342.0, Culture=neutral, PublicKeyToken=6faddca41dacb409'.'

The tag syntax is correct and the Demo UA application reads the tag correctly.

Neil

Last edit: 24 Feb 2020 16:44 by support. Reason: code formatting

Please Log in or Create an account to join the conversation.

Start
Prev
1
Next
End

1

Moderators: support

Time to create page: 0.057 seconds

Powered by Kunena Forum

Joomla SEF URLs by Artio