All right, I figured out that it works correctly when argv[0] is set to "./aplusb". I have a different question though: is there any feature that allows one to limit the amount of memory that a compiled program is allowed to use, similar to the "Limit Memory" command in DrRacket? <div class="gmail_quote">On Fri, Sep 17, 2010 at 4:32 AM, bbi5291 <<a href="mailto:bbi5291@gmail.com">bbi5291@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Consider the simple Racket program -------------------- #lang racket (+ (read) (read)) -------------------- When this is compiled using raco, the executable produced works exactly as intended, reading two integers on standard input and printing their sum. However, when I run the C program -------------------- #include <unistd.h> int main() { execl("aplusb","aplusb",(char*)0); } -------------------- where "aplusb" is the name of the Racket program, it exits immediately with the errors: -------------------- with-input-from-file: expects type <path or string> as 1st argument, given: #f; other arguments were: #<procedure> === context === embedded-load -------------------- How can I fix this problem? I am using Racket v5.0.1 on Ubuntu 9.10 (i386). </blockquote></div>