Can't load library: swt-osversion-win32-4970r5

[kwillenson]

Issue: on other (non-compile computer) Can't load library: swt-osversion-win32-4970r5

Both computers are running the same program. The java is compiled with

java version "25.0.1" 2025-10-21 LTS
Java(TM) SE Runtime Environment Oracle GraalVM 25.0.1+8.1 (build 25.0.1+8-LTS-jvmci-b01)
Java HotSpot(TM) 64-Bit Server VM Oracle GraalVM 25.0.1+8.1 (build 25.0.1+8-LTS-jvmci-b01, mixed mode, sharing

and the class files are made into an exe using native-image (also from Oracle GraalVM 25.0.1+8.1 ), but this is an SWT problem.

SWT is from
Eclipse SDK

Version: 2025-09 (4.37)
Build id: I20250905-0730

files included in the run environment are:

lib\org.eclipse.swt.win32.win32.x86_64_3.131.0.v20250820-1556.jar
swt-win32-4970r5.dll

In the main() method, I have added (but it does not help)
System.setProperty("swt.disableWindowsVersionCheck", "true"); //$NON-NLS-1$ //$NON-NLS-2$

Compilation computer with sample run
(GUI starts and behaves normally)

Edition Windows 11 Home
Version 24H2
Installed on ‎11/‎25/‎2024
OS build 26100.7462
Experience Windows Feature Experience Pack 1000.26100.275.0

C:\Program Files\LandMentor>LandMentor2020Native.exe --enable-native-access=ALL-UNNAMED
com.neighborhoodinnovations.ui.App.preApp(-1) LandMentor 2020 compiled at 2025-12-19 17:12:50.451
com.neighborhoodinnovations.ui.App.showScreenSize(-1) screenSize 1920, 1080, 96
WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::loadLibrary has been called by org.eclipse.swt.internal.Library in an unnamed module (file:/C:/Program%20Files/LandMentor/LandMentor2020Native.exe)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

com.neighborhoodinnovations.ui.App.createContents(-1) LandMentor 2020, compiled=2025-12-19 17:12:50.451
version=FULL, id=BC37-E795-C865-AEEF-7C9E-5DBC
started at 2025-12-22 11:06:38.133
com.neighborhoodinnovations.site.setup.Setup.(-1) C:\Users\keith\AppData\Local\LMSetup/default.set exists, now read it
com.neighborhoodinnovations.site.setup.Setup.readExternal(-1) readExternal initialize screenDPI 0
com.neighborhoodinnovations.site.setup.Setup.(-1) fileSetupVersion 20191011 Setup.VERSION_NUMBER 20191011
com.neighborhoodinnovations.site.setup.Setup.setSiteFileHome(-1) Setup.setSiteFileHome C:\Users\keith\AppData\Local\LMSetup
com.neighborhoodinnovations.site.setup.Setup.readExternal(-1) readExternal initialize screenDPI 0
com.neighborhoodinnovations.ui.App.createContents(-1) cleanupEventLogs
com.neighborhoodinnovations.site.setup.Setup.setSiteFileHome(-1) Setup.setSiteFileHome C:\Users\keith
com.neighborhoodinnovations.ui.App.createContents(-1) cleanupEventLogs done
com.neighborhoodinnovations.ui.App.createContents(-1) after verticalDesign 1402
com.neighborhoodinnovations.site.SiteLog.(-1) rafFileName C:\Users\keith\AppData\Local\LMSetup\site1_20251222_1106.evt
com.neighborhoodinnovations.site.Site.load(-1) Site.load(site1)
com.neighborhoodinnovations.site.SiteLog.(-1) rafFileName C:\Users\keith\AppData\Local\LMSetup\site1_20251222_1106.evt
com.neighborhoodinnovations.site.SiteLog.(-1) rafFileName C:\Users\keith\AppData\Local\LMSetup\site_20251222_1106.evt
com.neighborhoodinnovations.site.SiteLog.close(-1) SiteLog.close delete C:\Users\keith\AppData\Local\LMSetup\site_20251222_1106.evt
com.neighborhoodinnovations.site.SiteLog.(-1) rafFileName null
com.neighborhoodinnovations.site.setup.Setup.setSiteFileHome(-1) Setup.setSiteFileHome C:\Users\keith

Other computer with sample run
(GUI does not start)

Edition     Windows 11 Home
Version     25H2
Installed on      ‎11/‎22/‎2025
OS build    26200.7462
Experience  Windows Feature Experience Pack 1000.26100.275.0

C:\Program Files\LandMentor>landmentor2020native.exe --enable-native-access=ALL-UNNAMED
com.neighborhoodinnovations.ui.App.preApp(-1) LandMentor 2020 compiled at 2025-12-19 17:12:50.451
com.neighborhoodinnovations.ui.App.showScreenSize(-1) screenSize 2560, 1440, 96
WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::loadLibrary has been called by org.eclipse.swt.internal.Library in an unnamed module (file:/C:/Program%20Files/LandMentor/LandMentor2020Native.exe)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

Exception in thread "main" java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons:
Can't load library: swt-osversion-win32-4970r5 | java.library.path = [C:\Program Files\LandMentor, C:\Windows\system32, C:\Windows, C:\Program Files\Meta Horizon\Support\oculus-runtime, C:\Windows\system32, C:\Windows, C:\Windows\System32\Wbem, C:\Windows\System32\WindowsPowerShell\v1.0, C:\Windows\System32\OpenSSH, C:\Program Files\NVIDIA Corporation\NVIDIA App\NvDLISR, C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common, C:\Program Files\dotnet, C:\Users\ricky\AppData\Local\Microsoft\WindowsApps, ., .]
Can't load library: swt-osversion-win32 | java.library.path = [C:\Program Files\LandMentor, C:\Windows\system32, C:\Windows, C:\Program Files\Meta Horizon\Support\oculus-runtime, C:\Windows\system32, C:\Windows, C:\Windows\System32\Wbem, C:\Windows\System32\WindowsPowerShell\v1.0, C:\Windows\System32\OpenSSH, C:\Program Files\NVIDIA Corporation\NVIDIA App\NvDLISR, C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common, C:\Program Files\dotnet, C:\Users\ricky\AppData\Local\Microsoft\WindowsApps, ., .]
Can't load library: swt-osversion | java.library.path = [C:\Program Files\LandMentor, C:\Windows\system32, C:\Windows, C:\Program Files\Meta Horizon\Support\oculus-runtime, C:\Windows\system32, C:\Windows, C:\Windows\System32\Wbem, C:\Windows\System32\WindowsPowerShell\v1.0, C:\Windows\System32\OpenSSH, C:\Program Files\NVIDIA Corporation\NVIDIA App\NvDLISR, C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common, C:\Program Files\dotnet, C:\Users\ricky\AppData\Local\Microsoft\WindowsApps, ., .]
Can't load library: C:\Users\ricky.swt\lib\win32\x86_64\swt-osversion-win32-4970r5.dll
Can't load library: C:\Users\ricky.swt\lib\win32\x86_64\swt-osversion-win32.dll
Can't load library: C:\Users\ricky.swt\lib\win32\x86_64\swt-osversion.dll

    at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
    at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
    at org.eclipse.swt.internal.win32.version.OsVersion.<clinit>(Unknown Source)
    at org.eclipse.swt.internal.Platform.exitIfNotLoadable(Unknown Source)
    at org.eclipse.swt.internal.C.<clinit>(Unknown Source)
    at java.base@25.0.1/java.lang.Class.ensureInitialized(DynamicHub.java:778)
    at org.eclipse.swt.internal.win32.STARTUPINFO.<clinit>(Unknown Source)
    at org.eclipse.swt.widgets.Display.<clinit>(Unknown Source)
    at com.neighborhoodinnovations.ui.App.getDisplay(Unknown Source)
    at com.neighborhoodinnovations.ui.App.preApp(Unknown Source)
    at com.neighborhoodinnovations.ui.App.main(Unknown Source)
    at java.base@25.0.1/java.lang.invoke.LambdaForm$DMH/sa346b79c.invokeStaticInit(LambdaForm$DMH)

[HeikoKlare]

files included in the run environment are:

lib\org.eclipse.swt.win32.win32.x86_64_3.131.0.v20250820-1556.jar swt-win32-4970r5.dll

That one DLL is not sufficient. You will probably need these DLLs:

• swt-awt-win32-4970r5.dll
• swt-gdip-win32-4970r5.dll
• swt-osversion-win32-4970r5.dll
• swt-wgl-win32-4970r5.dll
• swt-win32-4970r5.dll
• WebView2Loader.dll

You can also see that the error message mentions the missing swt-osversion[...].dll:

Can't load library: C:\Users\ricky.swt\lib\win32\x86_64\swt-osversion-win32-4970r5.dll
Can't load library: C:\Users\ricky.swt\lib\win32\x86_64\swt-osversion-win32.dll
Can't load library: C:\Users\ricky.swt\lib\win32\x86_64\swt-osversion.dll

[kwillenson]

Exactly what I needed. I had swt-gdip-win32-4970r5.dll and swt-win32-4970r5.dll but not the others.

[HeikoKlare]

Great to hear that it resolved your issue. Thank you for the feedback.