UMG Pause Animation produces crash

anonymous_user_a7d9c852 · March 28, 2017, 6:30pm

Hi,

during the start of our game we fade in the main menu of the game. This animation pauses before the menu fades out again and loads the level. When I call the pause animation node the engine crashes. I made a complete new widget, same result. Before the new animation, named test, finishes, I call the event pause, then the engine crashes.
I added the blueprints of the new menu.

This is my error message:

Assertion failed: Ptr [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\MovieScene\Public\Evaluation/PersistentEvaluationData.h] [Line: 323] 



UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor_MovieSceneTracks!FPersistentEvaluationData::Get<FColorSectionData>() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\moviescene\public\evaluation\persistentevaluationdata.h:324]
UE4Editor_MovieSceneTracks!FColorTrackExecutionToken::Execute() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\moviescenetracks\private\evaluation\moviescenecolortemplate.cpp:171]
UE4Editor_MovieScene!FMovieSceneExecutionTokens::Apply() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\moviescene\private\evaluation\moviesceneexecutiontokens.cpp:17]
UE4Editor_MovieScene!FMovieSceneRootEvaluationTemplateInstance::Evaluate() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\moviescene\private\evaluation\moviesceneevaluationtemplateinstance.cpp:200]
UE4Editor_UMG!UUMGSequencePlayer::Tick() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\umg\private\animation\umgsequenceplayer.cpp:118]
UE4Editor_UMG!UUserWidget::TickActionsAndAnimation() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\umg\private\userwidget.cpp:952]
UE4Editor_UMG!UUserWidget::NativeTick() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\umg\private\userwidget.cpp:933]
UE4Editor_UMG!SObjectWidget::Tick() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\umg\private\slate\sobjectwidget.cpp:70]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:776]
UE4Editor_Slate!SConstraintCanvas::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\widgets\layout\sconstraintcanvas.cpp:227]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:102]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:102]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:46]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:21]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:37]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:37]
UE4Editor_Slate!SViewport::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\widgets\sviewport.cpp:117]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:46]
UE4Editor_SlateCore!SPanel::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\spanel.cpp:21]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SOverlay::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\soverlay.cpp:102]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_SlateCore!SCompoundWidget::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\scompoundwidget.cpp:37]
UE4Editor_SlateCore!SWindow::OnPaint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swindow.cpp:1831]
UE4Editor_SlateCore!SWidget::Paint() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:779]
UE4Editor_Slate!FSlateApplication::DrawWindowAndChildren() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1158]
UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1398]
UE4Editor_Slate!FSlateApplication::DrawWindows() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1115]
UE4Editor_Slate!FSlateApplication::TickApplication() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1720]
UE4Editor_Slate!FSlateApplication::Tick() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1512]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3086]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

anonymous_user_2426cd3c · May 29, 2017, 4:30pm

I’m experiencing the same thing - I was just about to write up a bug report about it.

Using an event track in an animation, if you pause that animation in the event callback (like you did) you will produce this crash.

The workaround is to set a flag and pause the animation on the next Tick. But, yes, it is a bug.

anonymous_user_1bd2267d · June 27, 2017, 1:04pm

This bug is causing some undesired effects for us as well. Implementing the workaround as described by jessome works in the interim, but is not a solution we can ship with. Has any progress been made in fixing this bug?

Thanks!

S-ed · June 28, 2017, 10:47pm

If it’s a bug report, move it to Bug Reports sections and tag it.