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+--- Thread: Minimserver won't start (/showthread.php?tid=7640)
Minimserver won't start - Medium Otis - 15-09-2025 23:33
Hello All.
Minimserver was running fine last week, but now it doesn't start.
l am running Win11 Pro 24H2 with the latest update KB5065426 as of 09/09/2025
I have uninstalled Minimserver/downloaded latest (as of 09/15/2025) and reinstalled the product.
I have uninstalled Java/downloaded latest (Ver. 8 update 461, released July 15, 2025) and reinstalled the product.
Restart.
Nothing.
I hope that I am overlooking something, but I would appreciate your comments about this issue.
Thank you.
The minimserver crash log follows:
MinimServer crash dump, produced at 20250915-155909.280
java.lang.UnsupportedClassVersionError: com/minimserver/ServerLauncher has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at org.jminim.core.ComponentClassLoader.findLocalClass(ComponentClassLoader.java:160)
at org.jminim.core.ComponentClassLoader.loadClass(ComponentClassLoader.java:94)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.jminim.core.Factory.newInstance(Factory.java:16)
at org.jminim.core.LauncherImpl.run(LauncherImpl.java:821)
at org.jminim.core.LauncherImpl.launch(LauncherImpl.java:126)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jminim.mlaunch.MinimLaunch.doLaunch(MinimLaunch.java:525)
at org.jminim.mlaunch.MinimLaunch.launch(MinimLaunch.java:150)
at org.jminim.mlaunch.MinimLaunch.launch(MinimLaunch.java:90)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jminim.launch.Launcher.launch(Launcher.java:88)
at com.minimserver.launch.LaunchServer.main(LaunchServer.java:38)
"AWT-EventQueue-0" id=23 WAITING
at sun.misc.Unsafe.park(Native Method)
- waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@161479c6
at java.util.concurrent.locks.LockSupport.park(Unknown Source)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
at java.awt.EventQueue.getNextEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
"AWT-Windows" id=21 RUNNABLE (in native)
at sun.awt.windows.WToolkit.eventLoop(Native Method)
at sun.awt.windows.WToolkit.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"AWT-Shutdown" id=20 TIMED_WAITING
at java.lang.Object.wait(Native Method)
- waiting on java.lang.Object@4313f5bc
at sun.awt.AWTAutoShutdown.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"Java2D Disposer" id=19 WAITING
at java.lang.Object.wait(Native Method)
- waiting on java.lang.ref.ReferenceQueue$Lock@7f010382
at java.lang.ref.ReferenceQueue.remove(Unknown Source)
at java.lang.ref.ReferenceQueue.remove(Unknown Source)
at sun.java2d.Disposer.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"Attach Listener" id=5 RUNNABLE
"Signal Dispatcher" id=4 RUNNABLE
"Finalizer" id=3 WAITING
at java.lang.Object.wait(Native Method)
- waiting on java.lang.ref.ReferenceQueue$Lock@1e802ef9
at java.lang.ref.ReferenceQueue.remove(Unknown Source)
at java.lang.ref.ReferenceQueue.remove(Unknown Source)
at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)
"Reference Handler" id=2 WAITING
at java.lang.Object.wait(Native Method)
- waiting on java.lang.ref.Reference$Lock@2b6faea6
at java.lang.Object.wait(Unknown Source)
at java.lang.ref.Reference.tryHandlePending(Unknown Source)
at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)
"main" id=1 RUNNABLE
at sun.management.ThreadImpl.dumpThreads0(Native Method)
at sun.management.ThreadImpl.getThreadInfo(Unknown Source)
at org.jminim.core.LogImpl.writeCrashDump(LogImpl.java:1249)
at org.jminim.core.LogImpl.printStackTraceSync(LogImpl.java:1174)
- locked org.jminim.core.LogImpl@778d1062
at org.jminim.core.LogImpl.printStackTrace(LogImpl.java:169)
at org.jminim.core.LauncherImpl.launch(LauncherImpl.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jminim.mlaunch.MinimLaunch.doLaunch(MinimLaunch.java:525)
at org.jminim.mlaunch.MinimLaunch.launch(MinimLaunch.java:150)
at org.jminim.mlaunch.MinimLaunch.launch(MinimLaunch.java:90)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jminim.launch.Launcher.launch(Launcher.java:88)
at com.minimserver.launch.LaunchServer.main(LaunchServer.java:38)
- - - - - - - - - - - - - - - -
RE: Minimserver won't start - simoncn - 16-09-2025 06:31
This problem is caused by MinimServer update 260. It is fixed in MinimServer update 263. On Windows, you can recover from this problem by doing the following:
1) In Windows Explorer, locate the folder C:\Users\your-user-name\AppData\Roaming\MinimServer\libext. The AppData folder is hidden by default but you can see it by entering the full path in the Explorer address bar.
2) Delete all files from this folder. Do not delete any other files.
3) Restart MinimServer
4) MinimServer will start and will automatically install update 263
RE: Minimserver won't start - Medium Otis - 16-09-2025 16:08
Thank you for your quick response. Of course, this fix works perfectly.