Dear CDF Collaborators, Version 1.0 of CDF Note 3020 is now available in CDF$PUB:ZPRIME_UPDATE.PS Title: A Search for Z' decaying to mumu from Run1A and Run1B: An update Authors: M. Pillai , P. de Barbaro, B. Kim, A. Bodek, K. Maeshima C. Grosso-Pilcher, E. Hayashi This note is an update on the analysis described in CDF 2910 to the full luminosity until after shutdown. Supporting Note: CDF 2910 CDF$PUB:CDF2910_ZPRIME_MUMU.PS Any questions or comments, please contact me at FNALD::PILLAI or any of the authors mentioned above. Thank you very much, Manoj K. Pillai M. Pillai FNALD::PILLAI University of Rochester P. de Barbaro FNALD::BARBARO Univeristy of Rochester A. Bodek FNALD::BODEK Univeristy of Rochester B. Kim FNALD::BOCKJOO Univeristy of Rochester K. Maeshima FNALD::MAESHIMA FNAL C. Grosso-Pilcher FNALD::CARLA University of Chicago E. Hayashi FNALD::HAYASHI Univeristy of Tsukuba Posted to CDF$PUB:CDF3020_ZPRIME_UPDATE.PS Posted by FNALE::PILLAI