On Shift: Roberto Calabrese, Sheng Jin Data taking at E_cm=3635 MeV finished with the run 854 (Integrated Luminosity 197 nb-1). The total integrated luminosity at this energy is about 1.5 pb-1. Then we asked to MCR to go to E_cm=3615 MeV to continue the search for the eta_c'. We have started taking data at this new energy at 20:00. Some problems during the run: -beam instability ( emittance growing, high loss rate for one minute); -constant luminosity mode not working properly ( inst. lum. goes from 2.1 to 2.5 *10^31 cm-2 sec-1 instead to remain constant). We switched to constant density mode; -FULL light on (DYC 12), DAQ in wait (no data acquisition). After a RESET on the run control window, DAQ resumes. Integrated Luminosity: Runs 855 : 213 nb-1 856 : ongoing Beam current (at present) 35.2mA Roberto and Sheng