I have installed Eclipse luna, and then php editor, symfony plugin and twig editor.
Now Eclipse displays a message when I am working on twig file:
The resource is not on the script path of a Script project.
But it display not only one time, it would be ok if so, but again and again like spam or flooding.
After searching the string on github, I found that the culprit was the dynamic language toolkit, but I cannot unsinstall it (because it is required).