Some days you just can't win. First, I found a bug in one of my macros. So I fired up the macro stepper. That triggered a bug in the macro stepper's derivation parser. So I tried to save a macro stepper debugging file. That further triggered a bug in the macro stepper's debugging file generator. So I added some printouts for manual debugging. And that caused a segfault. It's a good thing the segfault successfully created a crash report. If I had to start debugging C code, I imagine the next step would be my computer melting. Carl Eastlund