In all honesty, it sounds like you're trying to run TSF levels on 1.23 MLLE/JCS. You should set MLLE to the TSF version if you haven't yet. To do that, click Tools at the top, Change version then to v1.24 (TSF).
I do recommend optimizing tile count regardless as a lot of tiles are prone to crashing the game regardless of version. I bet there would at least be some duplicates or unused spaces/tiles.
Last edited by Treylina; Aug 19, 2019 at 03:30 AM.
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