problem in Project'xxx'is missing required library: '[path] \ XXX.jar' solution and close automatically updated Myeclipse

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1、problem中Project'xxx'is missing required library:'[路径]\XXX.jar'

Root item appears red cross, as shown below:

 

 This happens because there is duplication in the build path Library in your project and reference the wrong address or conflict jar package, we can do to solve:

Right-click the project ---> build path ----> Configure build Path, and then select the Library tab, find the error jar package can be removed from the list.

Finally, the project is intact.

2, Myeclipse updated automatically shut down.

 The previous version of MyEclipse MyEclipse7.0:
        Windows-> Preferences-> MyEclipse Enterprise Workbench> Community Community Essentials, remove the "Search for new features on startup" check box is selected in front of;

 MyEclipse7.0以后（包括MyEclipse7.0）的版本的MyEclipse：
       （1）Windows—>Preferences—>MyEclipse—>Maven4MyEclipse，去掉"Download repository index updates on startup"前面复选框的选中状态；
       （2）Windows—>Preferences—>General-->Startup and Shutdown，去掉“Automatic Updates Scheduler"前面复选框的选中状态；