A requirement to run nbcc successfully is that all the media servers are available - if one (or more) is down/ unavailable then this could be causing the 5_1. Another possible cause is an incorrectly decommissioned media servers.
For questions, please review our Frequently Asked Questions (FAQ) or e-mail found...@nbcc.org. If you still have questions after reviewing our FAQ document, please email found...@nbcc.org or call 336-232-0376.