Assertion failed: SyncPosition.NextMarkerName != NAME_None [File:D:/build/++UE5/Sync/Engine/Source/Runtime/Engine/Private/Animation/AnimSequence.cpp] [Line: 5198]
I have guessed this has to do with an animation or anim BP ive scoured through looking for something that might be misnamed or otherwise wondering if anyone can help me narrow it down. This crashes the editor every 10+ minutes while running. Yet to figure it out. Thanks.
Hi @CaptainGoph
I have the same error and I hope my discoveries help you.
I’ve dug deeper and found the AnimSequence.cpp. It was in the engine folder (same place where the error log said). However, it was not clear what is causing the “SyncPosition.NextMarkerName != NAME_None“ error, so I went to check my animations.
I’ve found some of my Blend Spaces were in a custom Sync Group, but my custom Animation Montages were not in this group.
First, I’ve delete the custom group from that blend space, but it caused other issues, due to the lacking of sync. I was unable to recreate the original error, but the not synchronized animatons were wrong, so I put back the group.
I’ve added the sync group to the montage where I’ve discovered the error.
I think using different sync groups may cause this kind of errors. It hardly depends on the framerate, becasue I was unable to recreate the error with low FPS. Moreover, my friend tested the packaged game, and he got the error doing different stuff. While I’ve managed to cause the error by rolling shortly after landing (only wtih more than 60 FPS) he just did some jumps and attacks and randomly, the error occured.
This discovery led me to check the landing animation, which handled by the mentioned Blend Space.
Now I’m checking all of my animations that connect to an animation which is in a group. Removing the groups may solve the problem, but all animation must be checked to see what happens without the sync.
Also, it worth to check the unreal documentation about sync groups:
