Dear Gambit-List, I've been accumulating a library of functions for simulating population processes (called "genxic"), and I'm running into some pesky errors. This code includes quite a lot of foreign functions, interfacing with the GNU Scientific Library. 1) When running numerically intense simulations, I'll get a segfault: ,---- | Process scheme segmentation fault `---- This might be after 50 iterations of a simulation when I'd planned to do 1152. Where do I go from there? I've tried running gsc and gsi in GDB, but pretty often I can't get a backtrace after the segfault. The conditions under which the segfault occurs varies. Sometimes I get it after loading the library. 2) I've gotten this bizarre error from one of my procedures, and would like to know where to go to debug it: ,---- | *** ERROR IN | genxic.o1#31| -- (Argument 1) F64VECTOR expected | (f64vector-ref | '#u16(47806 51966 47806 51966 47806 51966 47806 51966 47806 51966 47806 519... | 1) `---- I am not initializing any u16 vectors (that I know of), so how can I tell where this comes from, and how do I investigate, or find what procedure genxic.o1#31 is? I tried repeating the compilation, and this is what I got Dumping: #<primitive | genxic.o2|> #<primitive | genxic.o2#0|> #<primitive | genxic.o2#1|> #<primitive | genxic.o2#2|> #<primitive | genxic.o2#3|> ... #<primitive | genxic.o2#30|> #<primitive | genxic.o2#31|> #<procedure 1+> #<procedure 1-> #<procedure atom?> #<procedure xcons> #<procedure make-list>... How are these procedures labeled, and how do I figure out which one it is? Thanks, Joel -- Joel J. Adamson University of North Carolina at Chapel Hill CB #3280, Coker Hall Chapel Hill, NC 27599-3280 Before you reply to this email, please read http://www.unc.edu/~adamsonj/email-howto.html