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  5. QuickOPC-Classic in .NET
  7. Connections, Reconnections, COM/DCOM
  9. Connection lost after 30 minutes

Connection lost after 30 minutes

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30 Sep 2022 14:47 #11126 by radek.huber
Replied by radek.huber on topic Connection lost after 30 minutes
Hello,

thank you for pointing me into the right direction, I was able to get the exception message and solve the issue.

Br,
Radek Huber

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29 Sep 2022 18:45 #11125 by support
Replied by support on topic Connection lost after 30 minutes
Hello.
There must be some error, which we need to know first. And I do not think you are correctly observing the errors.

ReadMultiple cannot return null, that is impossible. You are probably talking about some member of some element of the array returned by ReadMultiple.
Aren't you referring to the AttributeData property of one of the array elements, or its Value property? They can be null if there was an error - but in this case, you need to inspect the Exception property of the array element (UAAttributeDataResult) - if it is not-null, it contains the error.

opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...%20the%20actual%20result_.html

opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...20nodes%20or%20attributes.html

Please post here what is in the Exception property of the elements returned by ReadMultiple.

Best regards

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29 Sep 2022 14:18 #11124 by radek.huber
Connection lost after 30 minutes was created by radek.huber
Hello,

After nuget update to the newest nuget version (5.63.246) i experience sudden connection break after 30 minutes. I tried this with both my local simulation server and MOPS server through network.

IEasyUAClientConnectionMonitoring notifies me with "disconnecting" and "disconnected" message, but no error or other message is presented. After this ReturnMultiple method returns null.
I tried to use Lock to lock session but problem still occurs

Is there some hidden setup for this?

Best regards,
Radek Huber

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  1. Forum
  3. Discussions
  5. QuickOPC-Classic in .NET
  7. Connections, Reconnections, COM/DCOM
  9. Connection lost after 30 minutes
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