NullPointerException when generating UMl ... looks like outputstream problem

Unexpected exception received while running Sketch It!: java.lang.NullPointerException Please, do not hesitate to report it: * by mail at philippe.mesmeur@gmail.com * by opening an issue at https://bitbucket.org/pmesmeur/sketch.it/issues

For an efficient investigation, please do not forget to provide: * the call stack that follows the current message * the IDEA log file (to find it, select entry "Show Log in Explorer", from "Help" menu)

Sorry for inconvenience and thank you for your contribution.

Call stack: org.pmesmeur.sketchit.diagram.UmlModuleClassDiagram.getClassDiagramOutputStream(UmlModuleClassDiagram.java:37) org.pmesmeur.sketchit.diagram.UmlModuleClassDiagram.getOutputFile(UmlModuleClassDiagram.java:31) org.pmesmeur.sketchit.diagram.UmlDiagram.generate(UmlDiagram.java:32) org.pmesmeur.sketchit.diagram.UmlDiagramsGenerator.generateModuleClassDiagram(UmlDiagramsGenerator.java:44) org.pmesmeur.sketchit.diagram.UmlDiagramsGenerator.generateClassDiagrams(UmlDiagramsGenerator.java:35) org.pmesmeur.sketchit.SketchIt.generatePlantUmlDiagram(SketchIt.java:75) org.pmesmeur.sketchit.SketchIt.generatePlantUmlDiagramWithExceptionHandling(SketchIt.java:61) org.pmesmeur.sketchit.SketchIt.generatePlantUmlModel(SketchIt.java:53) org.pmesmeur.sketchit.SketchIt.actionBody(SketchIt.java:45) org.pmesmeur.sketchit.SketchIt.access$000(SketchIt.java:12) org.pmesmeur.sketchit.SketchIt$1.run(SketchIt.java:32) com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:885) org.pmesmeur.sketchit.SketchIt.runInsideAnIntellijWriteAction(SketchIt.java:30) org.pmesmeur.sketchit.SketchIt.actionPerformed(SketchIt.java:24) com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:266) com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:283) com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.lambda$actionPerformed$0(ActionMenuItem.java:294) com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:263) com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:77) com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:284) java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967) com.intellij.openapi.actionSystem.impl.ActionMenuItem.lambda$fireActionPerformed$0(ActionMenuItem.java:112) com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:83) com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:107) com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:116) com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:121) com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:112) com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:517) com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:36) com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:539) java.desktop/java.awt.Component.processMouseEvent(Component.java:6651) java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342) java.desktop/java.awt.Component.processEvent(Component.java:6416) java.desktop/java.awt.Container.processEvent(Container.java:2263) java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5026) java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321) java.desktop/java.awt.Component.dispatchEvent(Component.java:4858) java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918) java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547) java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488) java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307) java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2773) java.desktop/java.awt.Component.dispatchEvent(Component.java:4858) java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778) java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727) java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721) java.base/java.security.AccessController.doPrivileged(Native Method) java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95) java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751) java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749) java.base/java.security.AccessController.doPrivileged(Native Method) java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748) com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:906) com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:844) com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:776) com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:422) com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698) com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:421) java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124) java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113) java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109) java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

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