错误The activator * Activator for bundle * is invalid

RCp开发中遇到该错误解决办法：
ok, after talking to paul webster on IRC, I found the solution, which was that on the build tab, at the top, you have two sections under “runtime configuration”, on the left, you have add library, it usually contains “.” as the only item, or more, but “.” is usually there. On the other side, you have add Folder, there was the problem, it was empty, upon adding “src”, which is the folder containing the plugin source code, I was able to finally get the plugin to work.