Problem Summary: When interactive scinstall(1M) runs a second time against the same JumpStart directory to set up a JumpStart server for installing a cluster, the cluster and JumpStart directory names might disappear. In the scinstall command-line invoked by this process, both of these names are missing.
Workaround: From your JumpStart directory, remove the .interactive.log.3 file, and then rerun scinstall.