本文转自：http://www.phperz.com/article/14/1205/39544.html

本文向大家讲解了Myeclipse错误：Errors occurred during the build. Errors running builder 'DeploymentBuilder' on project ...解决方法 ，感兴趣的同学参考下。

问题描述：

Errors occurred during the build. Errors running builder 'DeploymentBuilder' on project 'myf'. java.lang.NullPointerException

原因分析：

此问题一般发生在Myeclipse 保存文件并自动部署时候。本人在写项目的时候，还没等部署好，关闭了了myeclipse 10，结果出现了这种情况。有一种产生此错误的原因是因为此项目不不是由myeclipse创建的，需要检查.project 文件，并且添加com.genuitec.eclipse.j2eedt.core.webnature。

解决方法：

1、首先关闭MyEclipse工作空间。
2、然后删除工作空间下的“/.metadata/.plugins/org.eclipse.core.runtime/.settings/com.genuitec.eclipse.ast.deploy.core.prefs”

取消myeclipse的自动部署:
右键点击项目 ->properties -> Builders,将DeploymentBuilder勾选去除.

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