Thanks, the issue was because 'instanceDir' was indeed outside of server/solr and hence why it could not find my instance core. I have now migrated this data over to Solr home.
If solr restarts only search for cores within the Solr home, should the value 'instanceDir' be limited to relative directory path when creating them in via the admin interface, installing the instance into Solr home and therefore avoiding this issue? Regards, Tal -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html