Clojure FileNotFound exception when running uberjar, though file is in project source

Question

I am pulling my hair out trying to resolve the following error:

Exception in thread "main" java.io.FileNotFoundException: Could not locate composer/midi/short_message__init.class or composer/midi/short_message.clj on classpath: , compiling:(events.clj:12:1)

The reference to short-message is in the namespace declaration of events.clj:

(ns composer.ui.events
  (:use [seesaw core border chooser])
  (:require [composer.midi
             [io :as io]
             [time :as time]
             [player :as player]
             [short-message :as short]]))

And here is the namespace declaration of short-message itself in short-message.clj:

(ns composer.midi.short-message
  (:require [composer.algorithm.transform :refer :all]
            [composer.algorithm.markov.transform :refer :all]
            [composer.midi [io :refer :all] [message :as message]]))

short-message is in the same directory as all other files in composer.midi, and yet this seems to be the only one that is resulting in an issue. Indeed, after verifying the target directory in my project, this is the only namespace which doesn't seem to contain a corresponding class file. I thought it could be an error with the code, but if I try to load the file with (load-file "src/composer/midi/short-message.clj") at the REPL I don't have any issues.

Hrm. It appears that short-message.clj is not a valid filename. Changing it to short_message appears to have done the trick... very strange. — dtg
– dtg, Commented Apr 12, 2014 at 23:08

mynomoto · Accepted Answer · 2014-04-12 23:32:22Z

1

Your comment is right. In clojure dashes in namespaces correspond to underscore in filenames. So your file name should be short_message.clj as you found.

answered Apr 12, 2014 at 23:32

mynomoto

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