reading prolog terms

[Fumio Aoki]

I am programming C to call prolog, everything goes fine,
only I can not read list returned by prolog.
Please help and tell me how to get prolog list.

In prolog, S is a list, I want to read this list in C program.

?- path(penzance,london,S,P).

S = [penzance, exeter, bristol, london]
P = 304 ;

I tried,
Rd_String(arg[2]);
Rd_Chars(arg[2]);
Rd_Codes(arg[2]);
Rd_List(arg[2]);

neither workd, compiled program tells me

Fatal Error: Segmentation Violation

Please help, thanks in advance.

Best regards,
Fumio

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Fumio Aoki, Ph.D., Department of Ecology and Evolution,
State University of New York at Stony Brook, Stony Brook, NY 11794-5245
Email: address@hidden, Phone: (631) 632-8539, Fax: (631) 632-7626
URL: http://life.bio.sunysb.edu/~aoki/ or http://cauchy.bio.columbia.edu/fumio/