NoMachine client not starting on Windows 11

[howcio]

Since some update I’m struggling to run the client on Windows 11.

I’m on version 9.1.24

Sometimes I need to click hundred of times to be able to run it… the window just appears for 0.1s and disappears all the time.

[Britgirl]

Hi, when you say “update” do you mean an update of NoMachine or a Windows update? Can you tell us the specific build version of the Win 11 host?

[howcio]

I believe it started to happen after updating NoMachine (but even tho i tried to install previous version it didnt help), but I can’t rule out that Windows has also updated in the meantime

I made a video also https://imgur.com/8FbRkkM

system win 11 pro, 25H2 26200.6899
in trace.log i got this:

Sat Oct 25 22:36:43 2025

————————

Module: C:\Program Files\NoMachine\bin\nxplayer.bin pid 8960
Thread: 5960 exception 0xc00000ff, ‘Unknown’
In: C:\WINDOWS\SYSTEM32\ntdll.dll at 0x5f58dcbf#0  0x000000005f58dcbf ntdll.dll(RtlRaiseStatus)
#1  0x000000005f58e6f3 ntdll.dll(RtlUnwindEx)
#2  0x000000005f656be6 ntdll.dll(RtlUnwind)
#3  0x000000005e1aadbb msvcrt.dll(setjmpex)
#4  0x0000000065c07aa0 libnx.dll(ZN10Threadable7abortedEi)
#5  0x0000000065c07d54 libnx.dll(ZNK10Threadable5abortEi)
#6  0x0000000065b80880 libnx.dll(ZNK6Object5abortEi)
#7  0x0000000065c01084 libnx.dll(ZN6Parser11getRootPathEv)
#8  0x0000000065c011b5 libnx.dll(ZN6Parser14setDirectoriesEv)
#9  0x0000000065c01352 libnx.dll(ZN6Parser22parseBeforeNegotiationEv)
#10 0x000000006cfd03cd libnxcsl.dll(ZN17SlaveConfigParser22parseBeforeNegotiationEv)
#11 0x000000006cfc8036 libnxcsl.dll(ZN22SlaveConfigApplication13createSessionEiN7Options9ProxyTypeEN12SlaveOptions9SlaveTypeEPKc)
#12 0x0000000000483b48 nxplayer.bin
#13 0x00000000006aa0f2 nxplayer.bin
#14 0x00000000006aa312 nxplayer.bin
#15 0x00000000006aa613 nxplayer.bin
#16 0x0000000000934a3e nxplayer.bin
#17 0x000000005e31e8d7 KERNEL32.DLL(BaseThreadInitThunk)
#18 0x000000005f60c53c ntdll.dll(RtlUserThreadStart)

[Britgirl]

The stack dump says that libnx fails to read or create the user NoMachine folder, and because of that, it aborts and causes the process to close. Can you send the %USERPROFILE%\.nx\R-* logs? In there we might find more details about what’s happening.

[howcio]

in folders created at that time +- there are only “session” files:

Info: Starting NoMachine version 9.1.24.
Info: Loading settings from ‘C:\Users\MichaĹ‚\.nx\config\player.cfg’.
Info: Loaded translation files for ‘Polish’.
15936 13820 2025-10-25 22:36:44 043.317 Main: Creating the client session.
15936 13820 2025-10-25 22:36:44 043.317 ClientSession: Initializing session at 0x0000000003d54f20.
15936 13820 2025-10-25 22:36:44 157.630 RecentModel: Initializing recent connection providers.
15936 1796 2025-10-25 22:36:44 186.875 SlaveParser/Parser: WARNING! Creating directory ‘C:\Users\Michał\.nx’.
15936 1796 2025-10-25 22:36:44 186.875 SlaveParser/Parser: ERROR! Can’t create directory ‘C:\Users\Michał\.nx. Error is 2 ‘No such file or directory’.
Error: Can’t create directory ‘C:\Users\Michał\.nx. Error is 2 ‘No such file or directory’.
15936 1796 2025-10-25 22:36:44 187.876 SlaveConfigSession/Threadable: WARNING! Aborting threadable 0x0000000004f5eeb0.
15936 1796 2025-10-25 22:36:44 187.876 SlaveConfigSession/Threadable: WARNING! Error is 22, ‘Invalid argument’.
15936 1796 2025-10-25 22:36:44 187.876 SlaveConfigSession/Threadable: WARNING! Threadable 0x0000000004f5eeb0 aborted.
15936 1796 2025-10-25 22:36:44 187.876 SlaveConfigSession/Threadable: WARNING! Setting error in threadable 0x0000000004f5eeb0.
15936 1796 2025-10-25 22:36:44 187.876 SlaveConfigSession/Threadable: WARNING! Restoring context from threadable 0x0000000004f5eeb0.

it might be problem with polish ł/Ł in username ? if so, then why it randomly starts anyway xD

[Tor]

Hi. The problem is little bit more complex, please hold on while we look for a way to work around it or implement a solution you can test.

[Author]

Posts