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ava.lang.NoClassDefFoundError: org/apache/log4j/Category at com.solarmetric.log.Log4JLogFactory.newLogAdapter( at com.solarmetric.log.LogFactoryAdapter.getLog( at com.solarmetric.conf.ConfigurationImpl.getLog( at at at$ at at at at at at$ at at at at at at at org.eclipse.ui.actions.GlobalBuildAction$ at