Hello, I got following problem.
STM32CubeMX is unable to properly generate .project file for STM32CubeIDE. After clicking "GENERATE CODE", MX is copying library files, generating .h and .c files, but no .project file.
Following nullpointer exception can be found in log file. I already tested different versions of JAVA - no change.
I attached error messages, MX log, and .ioc file.
Anyone managed to fix this?
2026-03-15 10:27:00,707 [ERROR] ToolchainGenerator:531 -
java.lang.reflect.InvocationTargetException: null
at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:115) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:580) ~[?:?]
at com.st.microxplorer.plugins.projectmanager.model.ToolchainGenerator.CallMethod(ToolchainGenerator.java:406) ~[?:?]
at com.st.microxplorer.plugins.projectmanager.model.ToolchainGenerator.generate(ToolchainGenerator.java:506) ~[?:?]
at com.st.microxplorer.plugins.projectmanager.engine.ProjectBuilder.createToolChainFolders(ProjectBuilder.java:5583) ~[?:?]
at com.st.microxplorer.plugins.projectmanager.engine.ProjectBuilder.createProject(ProjectBuilder.java:987) ~[?:?]
at com.st.microxplorer.plugins.projectmanager.engine.GenerateProjectThread.run(GenerateProjectThread.java:61) ~[?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "Object.hashCode()" because "key" is null
at java.util.Hashtable.put(Hashtable.java:481) ~[?:?]
at sun.rmi.registry.RegistryImpl.rebind(RegistryImpl.java:287) ~[?:?]
at com.st.stm32cube.ide.common.services.mx.jar.core.mx.rmi.MailBox.connectNewMailBox(MailBox.java:46) ~[?:?]
at com.st.stm32cube.ide.common.services.mx.jar.core.mx.plugin.PlugIn.setupMailBox(PlugIn.java:282) ~[?:?]
at com.st.stm32cube.ide.common.services.mx.jar.core.mx.plugin.PlugIn.doExecute(PlugIn.java:329) ~[?:?]
at com.st.stm32cube.ide.common.services.mx.jar.core.mx.plugin.PlugIn.doGenerate(PlugIn.java:295) ~[?:?]
at com.st.stm32cube.ide.common.services.mx.jar.core.mx.plugin.PlugInAbstract.generate(PlugInAbstract.java:44) ~[?:?]
at com.st.stm32cube.ide.common.services.mx.jar.core.mx.plugin.PlugInAbstract.generate(PlugInAbstract.java:32) ~[?:?]
at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[?:?]
... 6 more
