Hough circle demo error.

gistfile1.txt

[ERROR] Exception during event handling:
	[Event] org.scijava.module.event.ModulesAddedEvent
	context = org.scijava.Context@5386659f
	consumed = false
	items[0] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > ../../trax-MP-matlab...DH2_CAL_001-1.tif', priority=0.0, enabled=true, pluginType=Command, inputFile='../../trax-MP-matlab/trax-MP-test/2017-1-30_Vu_Sample/DH2_CAL_001-1.tif'
	items[1] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > samples/ca-01.lsm', priority=0.0, enabled=true, pluginType=Command, inputFile='samples/ca-01.lsm'
	items[2] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > ../../TrackMate/samples/FakeTracks.tif', priority=0.0, enabled=true, pluginType=Command, inputFile='../../TrackMate/samples/FakeTracks.tif'
	items[3] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > ...18-6_1.49_100x_zstack_3um_10z_002.tif', priority=0.0, enabled=true, pluginType=Command, inputFile='../../trax-MP-matlab/trax-MP-test/1PSF_DH1_DN1/1PSF_DH1_DN1_18-6_1.49_100x_zstack_3um_10z_002.tif'
	items[4] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > samples/GUVs/ca-04.lsm', priority=0.0, enabled=true, pluginType=Command, inputFile='samples/GUVs/ca-04.lsm'
	items[5] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > samples/mg-20.lsm', priority=0.0, enabled=true, pluginType=Command, inputFile='samples/mg-20.lsm'
	items[6] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > ...18-6_1.49_100x_zstack_3um_10z_002.tif', priority=0.0, enabled=true, pluginType=Command, inputFile='/Users/tinevez/Development/DH/mp-imagej/se-gui/../dh-resource/calibration/1PSF_DH1_DN1_18-6_1.49_100x_zstack_3um_10z_002.tif'
	items[7] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > ...18-6_1.49_100x_zstack_3um_10z_002.tif', priority=0.0, enabled=true, pluginType=Command, inputFile='../dh-resource/calibration/1PSF_DH1_DN1_18-6_1.49_100x_zstack_3um_10z_002.tif'
	items[8] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > samples/ca-02.lsm', priority=0.0, enabled=true, pluginType=Command, inputFile='samples/ca-02.lsm'
	items[9] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > ../dh-resource/calib...DH2_CAL_001-1.tif', priority=0.0, enabled=true, pluginType=Command, inputFile='../dh-resource/calibration/DH2_CAL_001-1.tif'
	items[10] = class='org.scijava.plugins.commands.io.OpenFile', menu='File > Open Recent > samples/GUVs/ca-03.lsm', priority=0.0, enabled=true, pluginType=Command, inputFile='samples/GUVs/ca-03.lsm'
	[Subscriber] org.scijava.menu.DefaultMenuService [priority = 0.0]
	[Method] protected void org.scijava.menu.DefaultMenuService.onEvent(org.scijava.module.event.ModulesAddedEvent)
java.lang.IllegalStateException: Can't overwrite cause with org.scijava.InstantiableException: Class not found: org.scijava.plugins.commands.io.OpenFile
	at java.lang.Throwable.initCause(Throwable.java:457)
	at org.scijava.command.CommandInfo.loadDelegateClass(CommandInfo.java:304)
	at org.scijava.menu.ShadowMenu.details(ShadowMenu.java:575)
	at org.scijava.menu.ShadowMenu.addChild(ShadowMenu.java:554)
	at org.scijava.menu.ShadowMenu.addChild(ShadowMenu.java:547)
	at org.scijava.menu.ShadowMenu.addChild(ShadowMenu.java:547)
	at org.scijava.menu.ShadowMenu.addInternal(ShadowMenu.java:496)
	at org.scijava.menu.ShadowMenu.addAll(ShadowMenu.java:369)
	at org.scijava.menu.ShadowMenu.<init>(ShadowMenu.java:119)
	at org.scijava.menu.DefaultMenuService.addModules(DefaultMenuService.java:147)
	at org.scijava.menu.DefaultMenuService.initRootMenus(DefaultMenuService.java:180)
	at org.scijava.menu.DefaultMenuService.rootMenus(DefaultMenuService.java:169)
	at org.scijava.menu.DefaultMenuService.onEvent(DefaultMenuService.java:85)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.scijava.event.DefaultEventService$ProxySubscriber.onEvent(DefaultEventService.java:301)
	at org.scijava.event.DefaultEventService$ProxySubscriber.onEvent(DefaultEventService.java:275)
	at org.bushe.swing.event.ThreadSafeEventService.publish(ThreadSafeEventService.java:971)
	at org.scijava.event.DefaultEventBus.access$101(DefaultEventBus.java:57)
	at org.scijava.event.DefaultEventBus$1.run(DefaultEventBus.java:191)
	at org.scijava.thread.DefaultThreadService$2.run(DefaultThreadService.java:221)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.lang.ClassNotFoundException
	at org.scijava.command.CommandInfo.loadDelegateClass(CommandInfo.java:303)
	... 35 more
Exception in thread "main" java.lang.IllegalStateException: Can't overwrite cause with org.scijava.InstantiableException: Class not found: org.scijava.plugins.commands.io.OpenFile
	at java.lang.Throwable.initCause(Throwable.java:457)
	at org.scijava.command.CommandInfo.loadDelegateClass(CommandInfo.java:304)
	at org.scijava.menu.ShadowMenu.details(ShadowMenu.java:575)
	at org.scijava.menu.ShadowMenu.addChild(ShadowMenu.java:554)
	at org.scijava.menu.ShadowMenu.addChild(ShadowMenu.java:547)
	at org.scijava.menu.ShadowMenu.addChild(ShadowMenu.java:547)
	at org.scijava.menu.ShadowMenu.addInternal(ShadowMenu.java:496)
	at org.scijava.menu.ShadowMenu.addAll(ShadowMenu.java:369)
	at org.scijava.menu.ShadowMenu.<init>(ShadowMenu.java:119)
	at org.scijava.menu.DefaultMenuService.addModules(DefaultMenuService.java:147)
	at org.scijava.menu.DefaultMenuService.initRootMenus(DefaultMenuService.java:180)
	at org.scijava.menu.DefaultMenuService.rootMenus(DefaultMenuService.java:169)
	at org.scijava.menu.DefaultMenuService.getMenu(DefaultMenuService.java:76)
	at org.scijava.menu.MenuService.createMenus(MenuService.java:80)
	at org.scijava.menu.MenuService.createMenus(MenuService.java:66)
	at org.scijava.ui.swing.AbstractSwingUI.createMenus(AbstractSwingUI.java:258)
	at org.scijava.ui.swing.AbstractSwingUI.createUI(AbstractSwingUI.java:196)
	at org.scijava.ui.AbstractUserInterface.show(AbstractUserInterface.java:86)
	at org.scijava.ui.DefaultUIService.showUI(DefaultUIService.java:156)
	at org.scijava.ui.DefaultUIService.showUI(DefaultUIService.java:141)
	at net.imagej.ops.segment.hough.HoughDemo.main(HoughDemo.java:29)
Caused by: java.lang.ClassNotFoundException
	at org.scijava.command.CommandInfo.loadDelegateClass(CommandInfo.java:303)
	... 19 more