[BUG][EDITOR] Error message on opening level that works in the player

[Strato Incendus]

Hi everyone,

I'm getting the attached error message when I try to open my level "Holy Mountains" from Lemmings World Tour in the editor. No idea what it means.

I've updated the editor again to make sure I have the latest version, yet the error still occurs. The player meanwhile (latest stable version, not the Release Candidate yet) can run the level without any problems.

The level mainly uses one of GigaLem's Freedom Planet tilesets as well as the Sonic Angelisland tileset. The level itself is also attached.

Any ideas what might be causing this? I've edited the New-Formats version of this level before, so it definitely shouldn't have anything to do with missing or mis-named tilesets anymore. The conversion of Lemmings World Tour for New Formats has been out for a while now, after all, and it functioned perfectly fine, IchoTolot completed it long ago.

(Translation of the German parts: "Assertion error: Cancel = Quit, Repeat = Debug, Ignore = Continue --> referring to the buttons available at the bottom)

[Dullstar]

It just needed cleansing (still a bug, I think - just a UI one, not a technical one - the error message doesn't do a good job indicating this is what's wrong with it).

The attached level was cleansed with the RC.

[Strato Incendus]

Thanks a lot, Dullstar! It works perfectly again now!

I was suspecting it had to do with some deprecated feature, i.e. something a cleanse might be able to remove - but I didn't want to try it out without being certain, at the risk of accidentally removing something vital (even though Cleanse probably should never do that - and if so, then it removes a feature which should no longer be used anyway).

[namida]

Thanks a lot, Dullstar! It works perfectly again now!

I was suspecting it had to do with some deprecated feature, i.e. something a cleanse might be able to remove - but I didn't want to try it out without being certain, at the risk of accidentally removing something vital (even though Cleanse probably should never do that - and if so, then it removes a feature which should no longer be used anyway).

Also, Cleanse does not overwrite the existing copy of the level.