Thank you so much for your assistance ,  i managed to browse tags using our old license with  QuickOpc Version 5.61. I was not calling it properly.

In order to use version 5.61 you need to install your commercial license key.
The evaluation license key I sent you may also work.

But you have none of that currently, according to the error message.

Regards
 

Browsing worked on the last Quick OPC version , the moment i downgrade to version 5.61  I get this error.

{ "message": "Failed to browse DA OPC Server: Not allowed to run by the license \"Multipurpose\". You might be running a trial license, and the version of the software you are using is obsolete. Obtain a recent version to resolve this problem.\r\nProduct information follows. Component name: \"QuickOPC\", license IDs: \"Multipurpose\", version number: 561, release date: 2021/06/09, trial validity: 397 days, option expression: \"EasyDAClient\".\r\nContext: 0 dropped license(s).\r\n+ The client method called (or event/callback invoked) was 'BrowseNodes'.", "success": false, "statusCode": 400, "result": null }
 

Hello.
I do not quite understand your question.

All QuickOPC versions support browsing and discovery.

Regards
 

Thank you Received,  Just for confirmation on QUICK OPC   version 5.61  because this is what our current license support. 

Can we browse Tag ?
Can we browse server Nodes?

Thank you,

Hello.

The license key can be installed into the registry (e.g. using the License Manager utility), or embedded as a resource into your application (in newest version, also just placed as a file on the disk in a specified directory)..
This is all described in the User's Guide:  opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Late...html#Licensing%20Elements.html .

I will send you an evaluation license key, valid for 30 days, to the email address you used to register with the Forums.

Best regards
 

Thank you,  I will keep on the latest .net 9, so we can also have support when we buy new license.  Do you have any guide on how to properly register QuickOPC License on WebAPI .Net project.  Can you provide any evaluation license for Quick OPC 5.82 with steps on how to set it up on web api project. 
 

Each version of our software has an associated supported .NET runtime, OS versions, etc. You can view it here:  kb.opclabs.com/QuickOPC_Versions .

From this table, you can see that the latest version that supported .NET 6 was QuickOPC 2024.2 (5.81). You can still download it, and it will work either with newer commercial license, or with an evaluation license key that I can send to you, free of charge. BUT the fact that this version supports .NET 6 does not mean that WE will support you in case of problems, especially those that can have to do with an unsupported .NET runtime. We do not officially support older versions. So you risk being on your own in such case.

Best regards
 

Thank you, It works on .net 8.
But since we using .Net 6  you dont have QUICKOPC package that works with this version and also able to BrowseNodes and Tags?

Hello.

This is a weird error, so at this point I cannot be 100% sure about its cause. But it can be related to the fact that you are using .NET 6.
.NET 6 is no longer supported (neither by Microsoft nor by us). I suggest that you upgrade to .NET 8 or .NET 9, which are the supported runtimes in the latest version.

Best regards