Connection Expired - Client PC UI

[lukedonovan]

Hi,

We are upgrading an exisitng project to V3.14. The UI's used to run on the servers that WinCC OA is run on, but now we have sepearted this out, so that the UI's will now be off their own client PC, and the servers can be locked away.

When I try and run a UI from the client PC, it will connect to the server, but then its will say 'connection expired' and the login screen will never load.

We are running it in demo mode at the moment, as the dongles have to stay on site until we do the swap over. Is this the problem, the fact we are in demo mode?

Thanks

Luke.

[mkoller]

No, this has nothing to do with the license, since you are likely not getting to the point of the event manager connection, which would check the license.

What you see is usually a misconfiguration of your network DNS setup. It seems the server can not resolve the clients IP address to a host name.
Please make sure that all PCs in your network can correctly resolve the host names to IP addresses and vice versa.

The problem which occurs here is likely that the data manager makes a DNS query to get the hostname from the clients IP, and it probably does not get an answer in time, so the UI will cancel the startup since it takes too long to get an answer from the data manager.

[fmulder]

Hi Luke,

Yes, Martin is right.

* when a client doesn't connect
* when a client seems slower than you'd expect (or takes far too long to start)

.... then this is in 99% due to a bad name-resolution. Try to setup a hosts file. Make absolutely sure that you have all the computer names correct (uppercase, lowercase, exact name match !!!!). Check, double-check and re-check your hosts file. when it still doesn't work then re-check and re-check again

Good luck

Frenk

[lukedonovan]

Hi guys,

Thanks very much for the replies.

It is resolved now, I hadnt declared the client IP in the hosts.

Thanks for your help.

Luke

[RudiKreiner]

Using ping to make sure all PC know each others name would be a good way to start narrowing down a problem like this.