Hi ,
We have not heard from you in quite some time. I am marking this as answered for tracking purposes. If you are still experiencing this error, please comment back with the requested information. Thank you.
Actually I got frustrated of how many times my blueprints got corrupted and crashed the editor, so I moved to c++ coding now (yes, got a graduation project to finish :/)
So, I have no idea how to produce it, other than what i mentioned about put the laptop to sleep while unreal engine is running, then after waking it up, edit blueprints and save. and Im not sure if that is really the cause, but everytime I got blueprints damaged, I had unreal engine running while laptop is sleeping at some point.
Thank you anyway