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Exception when browsing an OPC UA Server

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13 Nov 2023 16:21 #12361 by support

Replied by support on topic Exception when browsing an OPC UA Server

I cannot reproduce the problem with the first option (using ApplicationUriTemplateString). It works for me. I still believe you have not set the right property.
I would need a reproducible scenario to look further into this.

Regards

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13 Nov 2023 14:09 #12359 by micham

Replied by micham on topic Exception when browsing an OPC UA Server

Yes.

Thanks.

Michael

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13 Nov 2023 13:51 - 13 Nov 2023 13:52 #12358 by support

Replied by support on topic Exception when browsing an OPC UA Server

Hello.

Are you sure that with the 2nd option, you have changed the name of the property (on the left to '=') as well?

Regards

Last edit: 13 Nov 2023 13:52 by support.

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13 Nov 2023 13:44 #12357 by micham

Replied by micham on topic Exception when browsing an OPC UA Server

Hi,

Thank you for your answer. I tried the 2nd option and this is what I got:

The 1st option worked. See below.

Thank you.

Michael

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13 Nov 2023 12:31 - 13 Nov 2023 12:31 #12356 by support

Replied by support on topic Exception when browsing an OPC UA Server

You can either

1) Do it in your code - something like below - this gives you absolute power because you can write any code to construct the application URI:

EasyUAFormsApplication.Instance.ApplicationParameters.ApplicationManifest.ApplicationUriString = "uri:EBO-OPCClientCFG:" & Environment.MachineName

2) Use the "template" syntax for the application URI, with pre-defined replaceable symbols (kb.opclabs.com/OPC_UA_Application_URI_Derivation ). QuickOPC will then fill in the computer name for you, in place of the "$(HostName)". In this case the property that you set is different - and it would look similar to this:

EasyUAFormsApplication.Instance.ApplicationParameters.ApplicationUriTemplateString = "uri:EBO-OPCClientCFG:$(HostName)"

Best regards

Last edit: 13 Nov 2023 12:31 by support.

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13 Nov 2023 11:14 #12355 by micham

Replied by micham on topic Exception when browsing an OPC UA Server

Hi

Thank you. How can I add the computer name programmatically?

Do I need to check the computer name and add it myself?

Thank you.

Michael

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13 Nov 2023 11:05 #12354 by support

Replied by support on topic Exception when browsing an OPC UA Server

There is no hard rule on the actual contents of the application URI, besides the fact that it must be unique in the OPC UA system (the "system" being the interconnected OPC UA applications you are dealing with).

You are good with your choice, if you know there won't be any other computer using precisely the same application URI. If there is such a risk, you should put some more distinguishing info into the application URI - and that can be the computer name, if you like.

Best regards

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13 Nov 2023 10:56 #12353 by micham

Replied by micham on topic Exception when browsing an OPC UA Server

Hi,

I tried this:

EasyUAFormsApplication.Instance.ApplicationParameters.ApplicationManifest.ApplicationUriString = "uri:EBO-OPCClientCFG" ' Nov-13-2023
EasyUAFormsApplication.Instance.AddToSystemMenu(Me)

Is this syntax correct? No need for the computer name in the URI?

Thank you.

Michael

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09 Nov 2023 16:59 #12346 by micham

Replied by micham on topic Exception when browsing an OPC UA Server

Hi,

Thank you. We shall try it.

Michael

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09 Nov 2023 16:43 - 09 Nov 2023 17:21 #12345 by support

Replied by support on topic Exception when browsing an OPC UA Server

Hello.
No, this is not about application name.

What matters here is the application URI. There is no ready-to-use example for it in the documentation, but the article explains the concepts. Your code needs to simply set EasyUAApplication.Instance.ApplicationParameters.ApplicationManifest.ApplicationUriString to a URI that is unique in the overall target OPC UA system.

When you set it as above, and then re-create the certificate, it will then be displayed next to "Subject URL Name".

Regards

Last edit: 09 Nov 2023 17:21 by support.

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