So I’ve been working on this project for quite a while, going on a month know and for the longest time everything was fine. I have a middle-good tier computer so I don’t think it’s a hardware issue.
The editor works fine - no lag or fps drop - but as soon as a click simulate or play, the engine freezes and I have to force close the project. It starts right back up in less than a minute but play/simulate cause it to freeze.
I’ve copied the project, went back to previous autosaves before the problem - no luck. They all freeze. Even the autosaves from days ago that had no problems the day before today freeze so I don’t know what’s going on.
Any help would be appreciated! 
Here’s the most recent crash report. I don’t know what any of it means so if someone can find the critical errors that’d be so helpful. Minor errors I’m okay with because I’m really new so if like a tree is clipping, I’ll resolve that later - if it doesn’t affect the overall game. Thanks!
link text
Build Data might be the problem
So Auto 9 was an autosave. That’s really interesting. Do you think deleting - or moving all autosaves to a seperate folder and clearing the intermediate folder might help? I’ll try (move to a different folder just in case this breaks things worse) and comment back. Thanks for the suggestion. Hopefully this is the issue!
Thank you, yeah unfortunately removing the autosaves didn’t stop it from freezing, I’ll work on trying to do the steps you mentioned! I’ll let you know how it goes - probably gonna leave it for tonight but again I appreciate the help!
It seems like every time the engine would auto save if you didnt save so often its corrupted or something, it was like it was trying to save the Build of your project but couldnt. Try this Open a Blueprint and just make a CustomEvent dont have to name it nothing just let it sit there Un-Compiles and Unsaved and let the Auto save do its thing then check logs to see if it creates and Error also you might want to go back thru all the BPs you Edited or Created and Compile them again to see if you didnt delete something on accident
No problem im glad i could assist