I've installed trepan3k in my python34 environment. I can run trepan3k. I can invoke it from within my python program. However whenever I try to issue gdb-like commands, I get errors. The program seems to be in a REPL-sort of mode where all it's willing to do is to interpret python commands. So "list 3" doesn't work, "next" tells me that next is a , and print("hello world") works fine, but I don't need a REPL, I need a debugger. I'm obviously missing something simple, but I think that reflects perhaps an opportunity to improve the documentation. And advice? Thanks, --KS