Errors running builder "Integrated External Tool Builder" on project

Myeclipse工具在编译文件的时候，总是报如下错误：

Errors during build.
Errors running builder 'Integrated External ToolBuilder' on project 'dataprocessor'.
The file does not exist for the external toolnamed jspack.

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在网上查了一下，有如下解决方法：

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

操作后，问题已经的得到解决。