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Removing Monitored Items
April 26, 2012
6:57, EEST
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fred
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January 27, 2012
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Using the newest version of Prosys Java OPC-UA SDK (1.3.2), I figured out that whenever I remove a monitored item (also from sample project), I get the following warning:

04/26/2012 08:50:31.669 WARN Subscription not found: 2
04/26/2012 08:50:31.669 WARN ack error: com.prosysopc.ua.ServiceException ServiceResult=Bad_SubscriptionIdInvalid (0x80280000) “The subscription id is not valid.”

In my opinion, it seems that the item is correctly removed from monitored items list -this is also what size of list tells me, but “Subscription Manager” does not recognize that an item has been removed

I have not tried this with an older version, so you’d might also get this warning in older SDK.

How can I prevent this warning and correctly remove item and subscription?

Thanks

April 26, 2012
7:07, EEST
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Jouni Aro
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The warning comes if the client tries to acknowledge data for a subscription that has been removed.

You can hide the warning by defining

log4j.logger.com.prosysopc.ua.server.SubscriptionManager=ERROR

in your log.properties.

It would probably not be that necessary to warn about this, though, so we should consider decreasing the level of that message.

Thanks for the note!

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