You are doing god’s work on a time-intensive computation, but your final step errors out :S Are you doomed to start everything from zero, and wait again for this long process? No! Find out.I show this with Emacs and Slime, then with the Lem editor (ready-to-use for CL, works with many more languages thanks to its LSP client).(This video is so cool :D Sound on) We use the built-in Common Lisp interactive debugger that lets us restart one precise frame from the call stack.