I was following UnrealSensei’s youtube tutorial and he was explaining the work of blueprints. And to check the input he used “print string” node and started game simulation to check it.
I followed, added a keyboard input, PrintString and immediately after pushing “play” UE crashed
So, after restarting UE, multiple PC restarts I still have the same problem and now it doesn’t allow me to open the level which I was using for tutorial
Is the file fully corrupted?
In addition: in a crash log it shows a file location as “D:\build.…” and I don’t have such a folder even if UE is installed on “D” drive
Hey there @PannkraT! Welcome to the community! It looks like a Material instance could be causing the crash. If you create a new empty level and try to simulate it, does it still crash with the same error?
Does it mean that I need to go through the mats/textures and clean them?
I only used a couple of simple 2K diffuse/normal maps + some assets from Megascan library for environment and foliage, all of which I set to Nanite meshes
It’s possible (but very unlikely) one of the MI’s are corrupted, you may be able to determine which one by checking the details of the materials in scene, however this could be a tedious process. An alternative method would be to drop half of the meshes in that you had, save, reload this map, and simulate and if it crashes with the same error you can begin narrowing it down.
I wouldn’t delete them randomly, I’d test half in a separate map, see if it crashes or if any errors end up in the log, then if they work, test more. When you finally get a crash it narrows it down. Then once you figure out what’s causing the issue, delete and reimport it and it may fix it.
Though if you don’t have much to remake, starting over is one way to handle it for sure. If that’s the plan, my next recommendation would be to prepare some source control and backups to be able to roll back the project to a working state if needed.
