An error occurred while installing the items
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Install, operand=null --> [R]net.sf.fjep.fatjar 0.0.31, action=).
Failed to prepare partial IU: [R]net.sf.fjep.fatjar 0.0.31.
解决办法：
go to Help -> Install New Software..., choose "The Eclipse Project Updates - http://download.eclipse.org/eclipse/updates/4.4" from the "Work with" list and then in the "Eclipse Tests, Examples, and Extras" category check "Eclipse 2.0 Style Plugin Support" and install it. After restarting Eclipse, install veloeclipse again and this time the installation will succeed.
说明：
4.4 根据你eclipse版本变化
标签：4.4,fatjar,eclipse,Eclipse,4.8,报错,0.0 From： https://www.cnblogs.com/xiaohuizhenyoucai/p/18111982