An internal error occurred during: "Launching xx". java.lang.NullPointerException的一个解决方法
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问题描述：部署项目时，An internal error occurred during: "Launching New_configuration (1)". java.lang.NullPointerException
遇到这个问题，看到很多人给的答案是clean工程之类的，但没有解决，后来看到其他人的方法，解决了，记录一下，希望对大家有帮助。
解决方法如下：
首先，删除工作空间下的“/.metadata/.plugins/org.eclipse.core.runtime/.settings/com.genuitec.eclipse.ast.deploy.core.prefs”
这个文件。在这个文件中存储了一些部署项目的信息。删了这个部署的项目的信息就没有错误了。
然后，重启启动MyEclipse。
问题解决
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