Crash when compiling Blueprint

We are interested in getting to bottom of this whether it’s a bug with engine or resolving issue so you can continue your project. You wrote," crashes literally started happening instant I introduced another layer to my Character BP and Anim BP, and started adding functionality to new layers, which involved renaming some functions."

  1. What do you mean by you “introduced another layer to your Character Blueprint and Anim Blueprint?” Please be specific.
  2. If you renamed some functions, engine may still be trying to call those functions somewhere in your Blueprints by their original name.
  3. Are you able to revert your Character and Animation Blueprints to a state before you added functionality? If so, does engine crash?
  4. Was this project started in a previous version of Engine before opening in version 4.8?

Please answer with as much detailed information as possible.

Thanks.