improve settings file error report
improve settings file error report

inverse/emoncms,emoncms/emoncms,chaveiro/emoncms,inverse/emoncms,chaveiro/emoncms,chaveiro/emoncms,inverse/emoncms,emoncms/emoncms,chaveiro/emoncms,inverse/emoncms,emoncms/emoncms,emoncms/emoncms,emoncms/emoncms