(1) Open goblin-ffd example.
(2) Switch to Animate Mode
(3) Enjoy.

Sorry, Nate. :sweat:

Seems related?:
viewtopic.php?f=9&t=2410

Note this doesn't happen to all projects, or even all projects with meshes.
I modified Speedy to test skinning and it saves, loads and enters Animate Mode just fine.

Now it's opening and entering Animate Mode fine.
It was super easy to repro. It sent several crash reports.
I hope the bug gets squashed though, whatever that was.

And then it decided to crash again.

An unexpected error has occurred:
java.lang.ArrayIndexOutOfBoundsException: 22
	at pR.a(SourceFile:277)
	at pR.a(SourceFile:320)
	at pR.a(SourceFile:304)
	at pR.a(SourceFile:293)
	at pR.a(SourceFile:295)
	at pR.a(SourceFile:295)
	at pR.a(SourceFile:295)
	at pR.a(SourceFile:295)
	at kK.a(SourceFile:452)
	at kK.I(SourceFile:293)
	at pc.c(SourceFile:923)
	at pm.a(SourceFile:759)
	at fc.a(SourceFile:28)
	at dH.a(SourceFile:166)
	at dH.a(SourceFile:131)
	at com.badlogic.gdx.scenes.scene2d.ui.Button.c(SourceFile:112)
	at com.badlogic.gdx.scenes.scene2d.ui.Button.a_(SourceFile:119)
	at zZ.a(SourceFile:79)
	at Bp.a(SourceFile:339)
	at kv.a(SourceFile:320)
	at o.a(SourceFile:70)
	at o.a(SourceFile:70)
	at ar.d(SourceFile:285)
	at af.run(SourceFile:227)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:711)
	at java.awt.EventQueue.access$000(EventQueue.java:104)
	at java.awt.EventQueue$3.run(EventQueue.java:672)
	at java.awt.EventQueue$3.run(EventQueue.java:670)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:681)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)

I also opened my other project with FFD and it crashes when you switch to Animate mode.

Frederik Bauer a écrit

I also tried by open the example project "spinosaurus", which has no meshes, and set new meshes on every sprite. I also animate the meshes after that in the Animation Mode. Everything is fine. So I guess the problem happens, when open an existing project with already existing meshes.

Yeah. I noticed it works fine with new projects but crashes with old ones with meshes and FFD.

Yeah, this was the old mesh crash. It's fixed.