License not valid for this Client version??

Chuck

I'm trying to create a proof-of-concept client in c# using Dotnet Standard Client version 5.0.5. It works when I point it at your push.lightstreamer.com DEMO server. When I point it at my data provider's server and logon according to the instructions they provided, it appears that my credentials are recognized and a connection is established.

Then I get a client listener onServerError with errorCode = 60errorMessage = “License not valid for this Client version ”.

What does this mean? What do I need to do?

Thanks.

Dario Crivelli

This is unexpected, because the notification of error 60 to the client is done early and excludes any credential check.
We should see in more detail the story of this connection attempt.
But, if I understand well, the Server is not run by you, but by a third party.

Please produce some client-side log.
Our stocklist client demo shows an example of how the log can be configured.

Chuck

Thank you for your quick response.

First, I was mistaken. The onStatusChange listener reported "CONNECTING" not "CONNECTED". It was then followed by "DISCONNECTED". I misinterpreted it. Sorry.

I took your example from GitHub and ran it as distributed. It created the log below marked TestDEMO.log.
Then I modified the example to point to https://push.cityindex.com and adapter “STREAMINGALL”. This required me to make a few changes to make a call to get a real time authentication password from the vendor’s REST API. Main had to be changed to
static async Task Main(string[] args)
to accommodate a an “await” on the HTTP POST to the authenticator.
//ls = new LightstreamerClient(serverAddress, "DEMO");
ls = new LightstreamerClient("https://push.cityindex.com", "STREAMINGALL");
ls.connectionDetails.User = "XXXXXXXX";
ls.connectionDetails.Password = sLogon[1]; // token from authenticator

Regards,
Chuck

TestDEMO.log
2020-08-26 12:28:55.1216|INFO|lightstreamer.actions|New Lightstreamer Client instanced (library version: Lightstreamer.DotNetStandard.Client 5.0.5)
2020-08-26 12:28:55.1675|INFO|lightstreamer.actions|Server Address value changed to https://push.lightstreamer.com/
2020-08-26 12:28:55.1675|INFO|lightstreamer.actions|Adapter Set value changed to DEMO
2020-08-26 12:28:55.2046|INFO|lightstreamer.actions|Forced Transport value changed to
2020-08-26 12:28:55.2226|INFO|lightstreamer.actions|Reconnect Timeout value changed to 25000
2020-08-26 12:28:55.2295|INFO|lightstreamer.actions|Connect requested
2020-08-26 12:28:55.2599|INFO|lightstreamer.actions|Session ID value changed to
2020-08-26 12:28:55.2599|INFO|lightstreamer.actions|Server Socket Name value changed to
2020-08-26 12:28:55.2814|INFO|lightstreamer.actions|Client IP value changed to
2020-08-26 12:28:55.2893|INFO|lightstreamer.actions|Server Instance Address value changed to
2020-08-26 12:28:55.2893|INFO|lightstreamer.session|Opening new session ...
2020-08-26 12:28:55.9035|INFO|lightstreamer.utils|Cookies to be inserted for https://push.lightstreamer.com/lightstreamer/create_session.txt?LS_protocol=TLCP-2.1.0: <none>
2020-08-26 12:28:57.3812|INFO|lightstreamer.subscribe|Start message handler
2020-08-26 12:28:57.3812|INFO|lightstreamer.actions|Session ID value changed to Sb3cf92b172e3b26cM56fT2856515
2020-08-26 12:28:57.3812|INFO|lightstreamer.actions|Server Instance Address value changed to https://push.lightstreamer.com/
2020-08-26 12:28:57.4027|INFO|lightstreamer.actions|Server Socket Name value changed to Lightstreamer HTTPS Server
2020-08-26 12:28:57.4027|INFO|lightstreamer.actions|Client IP value changed to 184.166.51.72
2020-08-26 12:28:57.4197|INFO|lightstreamer.utils|Cookies to be inserted for https://push.lightstreamer.com/lightstreamer: <none>
2020-08-26 12:28:58.7798|INFO|lightstreamer.actions|Keepalive Interval value changed to 5000
2020-08-26 12:28:58.7953|INFO|lightstreamer.subscribe|Adding subscription 1
2020-08-26 12:28:58.7953|INFO|lightstreamer.subscribe|Preparing subscription: 1
2020-08-26 12:28:59.2286|INFO|lightstreamer.subscribe|1 succesfully subscribed

TestSTREAMINGALL.log
2020-08-26 13:30:34.4058|INFO|lightstreamer.actions|New Lightstreamer Client instanced (library version: Lightstreamer.DotNetStandard.Client 5.0.5)
2020-08-26 13:30:34.4404|INFO|lightstreamer.actions|Server Address value changed to https://push.cityindex.com/
2020-08-26 13:30:34.4483|INFO|lightstreamer.actions|Adapter Set value changed to STREAMINGALL
2020-08-26 13:30:34.4483|INFO|lightstreamer.actions|Forced Transport value changed to
2020-08-26 13:30:34.4633|INFO|lightstreamer.actions|User value changed to XXXXXXXX
2020-08-26 13:30:34.4633|INFO|lightstreamer.actions|Password value changed
2020-08-26 13:30:34.4831|INFO|lightstreamer.actions|Reconnect Timeout value changed to 25000
2020-08-26 13:30:34.4831|INFO|lightstreamer.actions|Connect requested
2020-08-26 13:30:34.5210|INFO|lightstreamer.actions|Session ID value changed to
2020-08-26 13:30:34.5298|INFO|lightstreamer.actions|Server Socket Name value changed to
2020-08-26 13:30:34.5298|INFO|lightstreamer.actions|Client IP value changed to
2020-08-26 13:30:34.5433|INFO|lightstreamer.actions|Server Instance Address value changed to
2020-08-26 13:30:34.5433|INFO|lightstreamer.session|Opening new session ...
2020-08-26 13:30:34.7706|INFO|lightstreamer.utils|Cookies to be inserted for https://push.cityindex.com/lightstreamer/create_session.txt?LS_protocol=TLCP-2.1.0: <none>
2020-08-26 13:30:35.9143|INFO|lightstreamer.session|Closing session end
2020-08-26 13:30:35.9143|INFO|lightstreamer.subscribe|Reset message handler
2020-08-26 13:30:35.9321|INFO|lightstreamer.protocol|Protocol dismissed

Chuck

I just discovered that this may be a duplicate of the following forum post https://forums.lightstreamer.com/showthread.php?1922-License-not-valid-for-this-Client-version-lightstreamer
In which case, my question changes to: Do you have a quickstart/hello world/demo using Lightstreamer.DotNetStandard.Client 4.0.0 syntax? Or some other example of how I can alter your existing examples back to 4.0.0? All the examples that I can find on your site seem to have been updated to v5.0.5.

Regards,
Chuck

Thanks

Dario Crivelli

The previous versions of our examples, when available, are reachable via tags.
For instance, you can see:
https://github.com/Lightstreamer/Lightstreamer-example-Quickstart-client-dotnet/tree/for_version_4