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  1. Forum
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  5. QuickOPC-Classic in .NET
  7. Connections, Reconnections, COM/DCOM
  9. Error: Class is not licensed for use

Error: Class is not licensed for use

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18 Dec 2013 17:24 #1622 by Shea
Replied by Shea on topic Error: Class is not licensed for use
Your theory was correct.

Customer has verified that they purchased an "OEM" license (does not allow remote connections) for the server in which 64-bit does not work, and they purchased a "Gateway" license (allows remote connections) for the server in which 64-bit does work.

They are going to upgrade the license (or try and find a 64-bit version of RSLinx).

Thanks for your help.

Shea

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18 Dec 2013 16:35 #1621 by support
Replied by support on topic Error: Class is not licensed for use
I am not aware of anything we could do from our side of connection. We do not generate this error - it is RSLinx that does. It is probably under impression that it is being run "from remote" (and is not licensed for it).

A theory: Isn't RSLinx an in-process server when run from 32 bits app? I think it is. If so, 32-bit local apps load it into their process. But 64-bit app cannot do it, and runs the out-of-process server (a separate process). But RSLinx assumes this is for remote connections (DCOM) - and returns an error.

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18 Dec 2013 16:22 - 18 Dec 2013 16:28 #1620 by Shea
Replied by Shea on topic Error: Class is not licensed for use
The problem disappears when I run my application in 32-bit mode (I noticed that OPC Quick Client was running in 32-bit mode).

However, because we have some very inefficient coders in our organization I need to run the application in 64-bit mode so that it does not run out of memory. Any suggestions on how we can get the application to run correctly in 64-bit mode?

I have attached screenshots from the "Programs and Features" control panel from both the computer to which the 64-bit client can connect, and that to which it cannot.

Thanks,

Shea
Attachments:
Last edit: 18 Dec 2013 16:28 by Shea. Reason: screenshot attachment

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18 Dec 2013 15:52 #1619 by Shea
Error: Class is not licensed for use was created by Shea
I am using QuickOPC 5.22 Build 296.1.

Both with our application and the EasyOPC.NET Demo Application I receive an error "Class is not licensed for use" when I attempt to browse, read or subscribe to tags. The OPC Server is RSLinx running on the local computer.

I can successfully browse, read, and subscribe to tags from OPC Quick Client (Kepware) running on the local computer.

I am able to browse, read, and subscribe to tags on a remote computer from both the EasyOPC.NET Demo application as well as OPC Quick Client. The remote OPC Server is also an instance of RSLinx.

Any suggestions?

Thanks,

Shea

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  1. Forum
  3. Discussions
  5. QuickOPC-Classic in .NET
  7. Connections, Reconnections, COM/DCOM
  9. Error: Class is not licensed for use
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