Eclipse - Errors running builder on project

You can follow these steps.

1. Select the right project.
2. Choose "project"on the tool bar -> Properties
3. Click "Builders" on the menu of the popped up window
4. Remove the missing builders

Reference links

I was facing the same issue,

"Errors running builder 'Integrated External Tool Builder' on project {PROJECT NAME}"

you must go to your .project file in your work space, and you can put in comment or delete this lines

<buildCommand>
            <name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
            <triggers>full,incremental,</triggers>
            ...
            ...

</buildCommand>

and after that, you can rebuild your project and it will work correctly.

Reference: https://bugs.eclipse.org/bugs/show_bug.cgi?id=118294

I added this question and answering on my own as I could not find an answer on Stackoverflow and it may benefit someone else

Answer is:

On your project "project", right click -> Properties>Builders Remove the missing builder

Source http://www.eclipse.org/forums/index.php/t/28894/