The button is grayed out when you're generating into a plug-in that has not yet been created.
当您产生一个还没有被创建的插件时这个按钮也会变成灰色。
From this TAB, select the Gant plug-in check box and click the Install button.
在这个选项卡上选中Gant插件复选框，然后单击Install按钮。
Use the browse button to browse to the plug-in directory; under the plug-in directory com.ibm.rcp.tools.device.samplegallery, select the ercpapp.jar.
使用Browse按钮浏览到插件目录；在插件目录com . ibm . rcp . tools . device . samplegallery下面，选择archive目录中的ercpapp . jar文件。
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