This means that there was an unexpected exception when parsing the j3md

jMonkeyEngine SDK Exception Report
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Comment: This means that there was an unexpected exception when parsing the j3md. If this was due to you opening a j3md from a jar (org.openide.filesystems.FSException) then don't report it to us, if it differs, do so!
java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1
at com.jme3.gde.materialdefinition.fileStructure.leaves.DefineBlock.parse(DefineBlock.java:57)
at com.jme3.gde.materialdefinition.fileStructure.leaves.DefineBlock.(DefineBlock.java:21)
at com.jme3.gde.materialdefinition.fileStructure.DefinesBlock.(DefinesBlock.java:21)
at com.jme3.gde.materialdefinition.fileStructure.TechniqueBlock.(TechniqueBlock.java:56)
at com.jme3.gde.materialdefinition.fileStructure.MatDefBlock.(MatDefBlock.java:60)
at com.jme3.gde.materialdefinition.EditableMatDefFile.load(EditableMatDefFile.java:130)
at com.jme3.gde.materialdefinition.EditableMatDefFile.(EditableMatDefFile.java:98)
at com.jme3.gde.materialdefinition.MatDefDataObject.getEditableFile(MatDefDataObject.java:288)
at com.jme3.gde.materialdefinition.navigator.MatDefNavigatorPanel.updateData(MatDefNavigatorPanel.java:127)
at com.jme3.gde.materialdefinition.MatDefDataObject.createEditor(MatDefDataObject.java:206)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.netbeans.core.spi.multiview.MultiViewFactory$MapMVD.createElement(MultiViewFactory.java:431)
at org.netbeans.core.multiview.MultiViewModel.getElementForDescription(MultiViewModel.java:197)
at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:107)
at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:103)
at org.netbeans.core.multiview.MultiViewPeer.assignLookup(MultiViewPeer.java:236)
at org.netbeans.core.multiview.MultiViewCloneableTopComponent.getLookup(MultiViewCloneableTopComponent.java:98)
at org.openide.windows.CloneableTopComponent.componentOpened(CloneableTopComponent.java:169)
at org.netbeans.core.multiview.MultiViewCloneableTopComponent.componentOpened(MultiViewCloneableTopComponent.java:128)
at org.openide.windows.WindowManager.componentOpenNotify(WindowManager.java:282)
at org.netbeans.core.windows.WindowManagerImpl.notifyTopComponentOpened(WindowManagerImpl.java:1192)
at org.netbeans.core.windows.Central.addModeOpenedTopComponent(Central.java:773)
at org.netbeans.core.windows.ModeImpl.addOpenedTopComponent(ModeImpl.java:336)
at org.netbeans.core.windows.WindowManagerImpl.topComponentOpenAtTabPosition(WindowManagerImpl.java:1305)
at org.netbeans.core.windows.WindowManagerImpl.topComponentOpen(WindowManagerImpl.java:1262)
at org.openide.windows.TopComponent.open(TopComponent.java:473)
at org.openide.windows.TopComponent.open(TopComponent.java:453)
at org.openide.windows.CloneableOpenSupport.openCloneableTopComponent(CloneableOpenSupport.java:183)
at org.openide.windows.CloneableOpenSupport$1.run(CloneableOpenSupport.java:82)
at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEvent(NbMutexEventProvider.java:97)
at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.writeAccess(NbMutexEventProvider.java:62)
at org.netbeans.modules.openide.util.LazyMutexImplementation.writeAccess(LazyMutexImplementation.java:56)
at org.openide.util.Mutex.writeAccess(Mutex.java:292)
at org.openide.windows.CloneableOpenSupport.open(CloneableOpenSupport.java:79)
at org.openide.text.CloneableEditorSupport.open(CloneableEditorSupport.java:412)
at org.openide.awt.ActionDefaultPerfomer.actionPerformed(ActionDefaultPerfomer.java:47)
at org.openide.awt.ContextAction$Performer.actionPerformed(ContextAction.java:413)
at org.openide.awt.ContextManager.actionPerformed(ContextManager.java:261)
at org.openide.awt.ContextAction.actionPerformed(ContextAction.java:108)
at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:68)
at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:91)
at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:74)
at org.openide.awt.GeneralAction$BaseDelAction.actionPerformed(GeneralAction.java:354)
at org.openide.explorer.view.TreeView$PopupSupport.mouseClicked(TreeView.java:1608)
at java.desktop/java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:278)
at java.desktop/java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:277)
at java.desktop/java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:277)
at java.desktop/java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:277)
at java.desktop/java.awt.Component.processMouseEvent(Component.java:6624)
at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3398)
at java.desktop/java.awt.Component.processEvent(Component.java:6386)
at java.desktop/java.awt.Container.processEvent(Container.java:2266)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4996)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4828)
at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4584)
at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4828)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:775)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:98)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:747)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:744)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

Operating System: Windows 11
Engine Version as used by the SDK: 3.7.0-stable

Start at com.jme3.gde.materialdefinition.fileStructure.leaves.DefineBlock.parse, line 57, using the stack trace as the entry point, then trace how EditableMatDefFile.load opens the j3md. Reproduce the failure by opening the reported material definition in the SDK and verify that the same input no longer throws an ArrayIndexOutOfBoundsException.