We are using the last version 1.4.2.0.
On some Win11 pc we can't connect and we get the error:
"Connectino failed: end of stream
Possible causes:
- Another user is already listen on this ID
- Bad connection"
We are sure that no one is already listen on this pc
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A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome
2025-12-05: Celebrating the 23th anniversary of the UltraVNC (26th anniversary since the laying of the foundation stone): https://forum.uvnc.com/viewtopic.php?t=38130
2025-12-03: Could you please complete our poll/survey? Renaming UltraVNC files and service to be more clear: https://forum.uvnc.com/viewtopic.php?t=38128
There was a problem to vote, it is solved now! Thanks in advance!
2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page
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2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864
Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome
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Can't connect on some Win11
- Rudi De Vos
- Admin & Developer

- Posts: 6986
- Joined: 2004-04-23 10:21
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Re: Can't connect on some Win11
This is a general error, some on the way is bad.
end of stream indicate the sync is broken., server send 5, viewer expect 5 .... if the viewer get something else the 5 it trigger an end of stream.
Could also be cause by some firewalls, security software. network ...
Sorry it's hard to pinpoint what exact is wrong
Try first running and viewer and server on the same pc, then in the same network.. when that works try LAN.
end of stream indicate the sync is broken., server send 5, viewer expect 5 .... if the viewer get something else the 5 it trigger an end of stream.
Could also be cause by some firewalls, security software. network ...
Sorry it's hard to pinpoint what exact is wrong
Try first running and viewer and server on the same pc, then in the same network.. when that works try LAN.
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