diff -r b8773b7b9ecd -r 63714859ea5d launcher/http/src/main/java/org/apidesign/bck2brwsr/launcher/impl/Console.java
--- a/launcher/http/src/main/java/org/apidesign/bck2brwsr/launcher/impl/Console.java	Sun Apr 28 10:14:31 2013 +0200
+++ b/launcher/http/src/main/java/org/apidesign/bck2brwsr/launcher/impl/Console.java	Wed Oct 09 23:09:55 2013 +0200
@@ -227,7 +227,11 @@
             u = en.nextElement();
         }
         if (u == null) {
-            throw new IOException("Can't find " + name);
+            if (name.endsWith(".class")) {
+                throw new IOException("Can't find " + name);
+            } else {
+                return null;
+            }
         }
         try (InputStream is = u.openStream()) {
             byte[] arr;