Null pointer exception

[tmelz]

Just found your project and tried to run a basic example:

>lein clean
Cleaning up.
>lein deps
Copying 10 files to /home/mellort/Apps/jonromero-music-as-data-e82b033/lib
Copying 1 file to /home/mellort/Apps/jonromero-music-as-data-e82b033/lib/dev
>lein compile
>lein repl
REPL started; server listening on localhost:17237.
user=> (require 'music-as-data.core)
WARNING: + already refers to: #'clojure.core/+ in namespace: music-as-data.semantics, being replaced by: #'music-as-data.semantics/+
WARNING: + already refers to: #'clojure.core/+ in namespace: music-as-data.core, being replaced by: #'music-as-data.semantics/+
java.lang.NullPointerException (core.clj:1)
user=> (in-ns 'music-as-data.core)
#<Namespace music-as-data.core>
music-as-data.core=> (start main)
#<JFrame javax.swing.JFrame[frame0,62,24,202x232,layout=java.awt.BorderLayout,title=Music as Data,resizable,normal,defaultCloseOperation=EXIT_ON_CLOSE,rootPane=javax.swing.JRootPane[,1,31,200x200,layout=javax.swing.JRootPane$RootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]>
music-as-data.core=> (create-notes)
#'music-as-data.signalsnotes/G#7
music-as-data.core=> (p (pattern [A4 C5]))
nil
music-as-data.core=> (keep-looping)
java.lang.NullPointerException (NO_SOURCE_FILE:0)

This might be a mistake on my end, but I'm following the README almost exactly.

[nielsegberts]

Same problem here.

[janr]

I'm seeing the same problem on Ubuntu 10.04 - 64 bit Leiningen 1.4.2 on Java 1.6.0_20 OpenJDK 64-Bit Server VM