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Control Client license issue (Plant SCADA Version 2023, Update 10)

Madhu

Hi all,

We have seen a small issue recently with the runtime manager failure message issue on the client PC as shown in the picture below.


When we are trying to open the certain remote client PC SCADA system through tight VNC Viewer, the client closes/stops immediately and showing this failure message as error. But when we select the Plant runtime manager again here, the client process is starting again without any issues. And also, this issue is not coming at all when we open the other VNC viewers/client PCs, even though we configured the same way.

In all the client PCs, we configured the primary server name in the system configurator to get the control client licenses from AEL Manager.

Recently, we upgraded few SCADA pages and deployed the latest version on these client PCs. We are seeing this issue mostly after this new upgraded version deployment.

Does anyone have insights why this issue is coming only on this client PC & not all, and how to avoid this issue later?

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    Hi all,

    We identified & fixed this control client license issue now. The cause of the issue is about DNS. There are too many DNS records on the DNS server defined. Several PC's are changed after they were defect but these PC's did take the same IP-address from the DHCP server. It has registered the new PC but didn't remove the old record.

    So, when the client's started the license server detected 2 active clients based on the DNS records (Some PC's take double license). Because of this reason, there weren't enough license available anymore for some of these client PC's.

    We cleaned up all the duplicate DNS records/Deployment server/License server. Everything is good now.

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  • 0

    Hi all,

    We identified & fixed this control client license issue now. The cause of the issue is about DNS. There are too many DNS records on the DNS server defined. Several PC's are changed after they were defect but these PC's did take the same IP-address from the DHCP server. It has registered the new PC but didn't remove the old record.

    So, when the client's started the license server detected 2 active clients based on the DNS records (Some PC's take double license). Because of this reason, there weren't enough license available anymore for some of these client PC's.

    We cleaned up all the duplicate DNS records/Deployment server/License server. Everything is good now.

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