The information above pops up in your Emacs. The top window shows the Guile stack, with the innermost frame selected; the bottom window shows the source code corresponding to the selected frame.

Guile has just hit the breakpoint on the gnc:kvp-option-dialog procedure and has stopped just before calling this procedure. Let's step into this procedure by pressing i or by selecting "Step Into Current Expression" from the Guile-Debug menu. Next