The "${top-classes}" directory already exists--ABORTING. ${ant.project.name} requires Java 2 SDK 1.4 or greater to continue. A valid J2SDK installation could not be found at: ${env.JAVA_HOME} Please set the JAVA_HOME environment variable to point to the location of your J2SDK installation. A valid JSK installation could not be found at: ${env.JINI_HOME} Please set the JINI_HOME environment variable to point to the location of your JSK installation.