[gambit-list] Non-REPL Debugging in Gambit

Hi, Is there an easy way to access the debugging functions of the Gambit REPL in a programmatic way? I would like to call (for example) a function that would give me the equivalent of ",b" and ",e" inside my exception-catcher. Thank you, Francois Magnan P.S.: I searched the source code and I found commands like ##cmd-e but I don't know I to use them.