Link: https://halldweb.jlab.org/cgi-bin/data_monitoring/monitoring/runBrowser.py?period=RunPeriod-2015-12&ver=mon_ver4&run_number=004319
This run number does not exist for the given run period/version number!!!!
Click on a system header, then mouse over light blue entries in table to view histograms, and click on an entry to freeze/unfreeze a specific histogram.
Run 4319: