Eclipse Error: The builder launch configuration could not be found.

Errors during build.
Errors running builder "Integrated External Tool Builder" on project project.
The builder launch configuration could not be found.
Errors running builder "Integrated External Tool Builder" on project project.
The builder launch configuration could not be found.
Errors running builder "Integrated External Tool Builder" on project project.
The builder launch configuration could not be found.
Errors running builder "Integrated External Tool Builder" on project project.
The builder launch configuration could not be found.
Errors running builder "Integrated External Tool Builder" on project project.
The builder launch configuration could not be found.
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1.Select the right project
2.Choose "project"on the tool bar -> Properties
3.Click "Builders" in the menus of the popped up window
4.Remove the missing builders

Reference                                      

1. http://dy.f.blog.163.com/blog/static/60711476200941824126555/