Subject: sitara / cpr availability to all sitara users : the sitara system will be brought down on a nightly basis between 12 : 01 am - 4 : 00 am central time for nightly processing . the system will be available in the morning after that time , with positions primed by 5 : 30 am . cpr will be available during these times . please call the sitara hotline ( ( 713 ) 853 - 7049 ) if you have any questions or concerns .