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RDP doesn't works with Embedded Session

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Hello,
when I try to open an RDP embedded session (to Win2000 server) I receive following error (sorry for italian language); try to translate the message:
"session interrupted because license protocol error", or something similar :-)
But if I open the same session as External, or via mstsc.exe is working.
I'm on RDM 12.0.10 beta.

image
https://www.screencast.com/t/2mU4gvLP8O

thank you
Davide

Clock3 yrs

Hello,

This error typically occurs when too many sessions are open concurrently. How many sessions do you run at the same time?

The embedded display mode makes use of the Microsoft ActiveX for RDP. If you want to isolate the cause to see if its a protocol error or just within Remote Desktop Manager, you can try to replicate your scenario using Microsoft's Remote Desktop Connection Manager (RDCMan). It would help in showing if the issue is within RDM. Could you try it out?

Best regards,



Maurice Côté

signaturesignature

Clock3 yrs

Hi Maurice,
I have only one opened connection to that server. But what I want to point out is that if I open the same connection, at the same time, from RDM as external (not embedded) or via mstsc is working.

Connection with RDCMan is working.

In connections.loog there are no related entries, and in RemoteDesktopManaer.debug there are following lines:

01/02/2017 14:12:06]DEBUG Opening in Console / Admin mode
[01/02/2017 14:12:10]DEBUG Il computer remoto ha interrotto la sessione a causa di un errore del protocollo di gestione delle licenze.
Provare a riconnettersi al computer remoto o contattare l'amministratore del server.
[01/02/2017 14:12:11]DEBUG RDP - Disconnect:2056 / exDiscReasonNoInfo

thank you
Davide

Clock3 yrs

Hello,

Could you try to enable/disable the NLA option in the Connection tab of your RDP session.

If this is not working, could you try the solutions proposed in this help topic
https://help.remotedesktopmanager.com/troubleshooting_protocolerror.htm

Best regards,



Jeff Dagenais

Happy Holiday Season!
Although our various support queues will be monitored during the coming holiday season, Devolutions' offices will be closed from December 24th, 2019, to January 1, 2020, inclusively.

signaturesignature

Clock3 yrs

Hello Jean-Francois,
tried all your solutions, but nothing changes. I have configured the session to warn if verification does not meet minimum policy requirementes
https://www.screencast.com/t/7CjuBGdAMZzP
and the warning box appears only when open the session in embedded mode, in all other ways the connection is established without any message.

thank you.

Clock3 yrs

Hello,

We have another help topic that may help you with this error
https://help.remotedesktopmanager.com/troubleshooting_licensingprotocolerror.htm

If you are running Windows 64bit, please note that two registry keys needs to be deleted.

Best regards,



Jeff Dagenais

Happy Holiday Season!
Although our various support queues will be monitored during the coming holiday season, Devolutions' offices will be closed from December 24th, 2019, to January 1, 2020, inclusively.

signaturesignature

Clock3 yrs

Jean-Francois,
tried also with your last solution but not working for me, even after deleting registry entries, the connection fails every time. I have had to reimport the entries into the registry.
For me is not so important continue to investigate this issue, but if it is to you, I can keep trying to troubleshoot.
Let me know.
thank you all for your time.

Clock3 yrs