错误解决：Unable to add module to the current project as it is not of packagi

今天新建Maven工程，突然就不好使了。报如下错误：

Unable to create project from archetype [org.apache.maven.archetypes:maven-archetype-quickstart:1.1]
Unable to add module to the current project as it is not of packaging type 'pom'

咋回事啊，我没动过Eclipse啊，咋就突然罢工了呢？查了半天也没解决，无奈dogpile（集成了Google, Bing, Yahoo!等几个流行搜索引擎，老外推荐的）一把。在这里找到了答案：http://forums.atlassian.com/thread.jspa?messageID=257288044&#257288044

Are you running the command from a directory that has an existing pom.xml file in it? I think that may be confusing Maven, as it thinks you're trying to add your new project as a sub-module of the project in the working directory.

原来是因为我在Workspace下放了个POM文件，造成了M2eclipse插件的误解，删掉就OK了。