Error overriding methods

[andresdominguez]

TO_STRING: TO_STRING
java.lang.NoSuchFieldError: TO_STRING
at com.karateca.jstoolbox.generatemethod.OverrideMethodAction.showDialog(OverrideMethodAction.java:64)
at com.karateca.jstoolbox.generatemethod.OverrideMethodAction.access$000(OverrideMethodAction.java:19)
at com.karateca.jstoolbox.generatemethod.OverrideMethodAction$1.stateChanged(OverrideMethodAction.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at com.intellij.util.EventDispatcher.dispatch(EventDispatcher.java:89)
at com.intellij.util.EventDispatcher.access$100(EventDispatcher.java:34)
at com.intellij.util.EventDispatcher$1.invoke(EventDispatcher.java:65)
at $Proxy118.stateChanged(Unknown Source)
at com.karateca.jstoolbox.generatemethod.ParentNamespaceFinder.broadcastReady(ParentNamespaceFinder.java:71)
at com.karateca.jstoolbox.generatemethod.ParentNamespaceFinder.access$500(ParentNamespaceFinder.java:16)