it seems the gas started to run out around yesterday at 12.
http://www.jlab.org/~adaq/halog/html/0812_archive/081225122159.html
will try to see if someone can look at it.
If possible change all empty bottles.
If the nitrogen ran out, one needs to change the nitrogen first and turn the by pass valve in the gas shed to power the switch.
Check in the gas shed house using the key from the keybox in the counting
house that all bottles are in line, press the corresponding button on the
switch boxes if necessary.
A copy of this log entry has been emailed to: vasulk@jlab.org,xqian@jlab.org,segal@jlab.org,spiegel@jlab.org,subedi@jlab.org,jpchen@jlab.org