Is there any way of deleting a track that causes a crash? I can open the LevelSequencer but when I try to save it, crashes.
When deleting the ParameterCollection track it also crashes. I know this is the issue because the bug was caused when renaming the Param name within the collection itself. It seems like a referencing issue. Even when I try to rename the parameter back to what it was before the crash, problem persists.
I need this fixed ASAP so if anyone could recommend how to copy the other tracks into a new LevelSequence or delete the problem track…
I believe the solution is either fix the referencing name update in ParameterCollection or create a validation within LevelSequencer for that class type.
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The Engine hyperlinks to the bug reporting page need to be updated then. Thanks.
Will have to spend another 12 hours on creating a new sequence. Backup didn’t help as Sequencer is incredibly reference reliant/validation not fully implemented.
Notes to anyone using Sequencer: I have come across multiple asset-corrupting bugs around materials and parameters. My advice is: have material changes event-driven using Blueprints. Do not use ParameterCollection in Sequencer.
Also, split up your sequences if you have a lot of tracks/keys. That way not everything can get corrupted at once…
There are ways to quickly re-create a Sequence if the asset can be opened (4.19.0):
Duplicate your project and rename one version so you should have two: MyProject & MyProject_OLD.
Have the engine application instances side-by-side. Only have your level and Sequencer open and docked.
In MyProject: delete the offending LevelSequencer, purging references.
Create a new LevelSequencer in MyProject and name it somethig different.
Now you’re ready to copy/paste the Tracks between the projects.
…
-. Note that folders CANNOT be copied so don’t select any
-. With the above in-mind you can copy multiple Tracks (use Ctrl and Shift to multi-select)
-. Work structurally down, create folders in MyProject if it helps organisation
-. First add a scene actor Track in MyProject Sequencer. If you right click on it, “Paste” should appear which will copy other tracks
-. Name references should resolve automatically. The first copied Track may be “red”/unresolved. Simply right-click and re-assign the actor (it will overwrite the duplicate)
-. Note that any duplicate Actor reference names in the scene will cause bugs when copying/pasting. This is apparent for ROOT assigned objects. Just note that any ‘Track name’ duplicates may cause unwanted copying/pasting behaviour (so check the keys are correct)