# ClassNotFoundException: namespace **URL:** \ **Category:** Uncategorized\ **Created:** [November 2, 2012, 2:18pm UTC](https://discuss.kotlinlang.org/t/classnotfoundexception-namespace/1045 "2012-11-02T14:18:58Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Yves\_t](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.kotlinlang.org/yves_t/32/1605_2.png) [@Yves\_t](https://discuss.kotlinlang.org/u/Yves_t)\ **Post date:** [November 2, 2012, 2:18pm UTC](https://discuss.kotlinlang.org/t/classnotfoundexception-namespace/1045/1 "2012-11-02T14:18:58Z")
Hello, I’m trying the hello world example in the getting started page. When I want to run the example I receive: Exception in thread "main" java.lang.ClassNotFoundException: namespace at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:186) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:113) Process finished with exit code 1 I’m using: - JDK 1.7\_09 - intellij community edition 122.694 - Kotlin plugin   0.4.140 Can somebody please tell me what I’m doing wrong ? ---
**Author:** ![abreslav](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.kotlinlang.org/abreslav/32/8279_2.png) [@abreslav](https://discuss.kotlinlang.org/u/abreslav)\ **Post date:** [November 2, 2012, 2:23pm UTC](https://discuss.kotlinlang.org/t/classnotfoundexception-namespace/1045/2 "2012-11-02T14:23:34Z")
Kotlin is tested only with 122.639 PLease report the issue to the tracker. We will investigate it. Thanks