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10/10/2023
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Hello,everyone.
I have a case where an OPC UA server sends a ServiceFault with the message BadNoSubscription 0x80790000.
About 10 minutes before the message appeared, a RepublishRequest to the server and a RepublishResponse from the server were output only once.
After that, publishRequest and publishResponse are exchanged for 10 minutes, but a ServiceFault is returned for publishRequest.
Please let me know if you have any insight as to the cause of this.
05/30/2017
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The subscription is timing out.
This is usually because you are not sending a publish request or all publish requests are being used by higher priority subscriptions.
10/10/2023
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Thank you for your response.
The connection is one-to-one, so there should not be any other priority subscriptions.
Is there a relationship between the subscription expiring and the RepublishRequest coming from the server?
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02/24/2014
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Remember that you can queue up multiple PublishRequests, so the server can dequeue the request and send a response when needed (typically more then one are queued, are you queueing more than one?). These PublishRequests are share between all subscription on a session.
Do you have the settings used for the Subscription? Publishing interval? keepalive?
Paul Hunkar - DSInteroperability
10/10/2023
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Thank you for your response.
We have not been able to confirm that it is even set up because we are using a library published by the OPC Council.
I would like to know if anyone knows the subscription specifications for the libraries published by the OPC Council.
05/30/2017
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Are you using the code from: https://github.com/OPCFoundati…..ETStandard?
Then it should be doing things properly on the client side when it comes to sending publish requests.
You need to check the parameters, such as CurrentLifetime, returned from the server after the subscription is created.
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