Matthew,
Assuming that this module is `slon/lang/reader`, does it help to add++lib slon/lang/reader to the `raco exe` command, along with the `++lib` argument that you have already?
Unfortunately, no. Nothing has changed: $ raco exe ++lib slon/slon-language ++lib slon/lang/reader slon-main.rkt $ ./slon-main standard-module-name-resolver: collection not found collection: "slon" in collection directories: context...: standard-module-name-resolver /home/dpavlov/era/slon/slon-main.rkt:19:0: slon-main #%mzc:slon-main: [running body] loop That was Racket 5.3.4 on Debian. I have tried the latest Racket release on Windows -- same result. Regards, Dmitry ____________________ Racket Users list: http://lists.racket-lang.org/users

