Hi, there! I am graduate student of political science in Texas A&M and have been using the CLARIFY program for years. Days ago i tried to reproduce the Figure1: Probability of Voting by Age in "Making the Most of Statistical Analyses" (King, Tomz and Wittenberg 2000), while i encountered a problem (bug?) when using the commands in Stata 8.2. Well, I downloaded the data set and the replication code from http://gking.harvard.edu/data.shtml. When i tried to use the command in Stata 8.2, the Stata always responded with the error message "class member function not found r(4023)". I attached the downloaded data (turnout.dta), replication code (turnout.do), and the log of using the command under Stata 8.2 (turnout.smcl) to this mail for your reference. Please refer especially to the end of the log file which has the error message as following: plo12graph_g.new phi12 plo16 phi16 ageaxis, s(iiii) c(||||) xlabel(18,24,30,36,42,48,54,60,66,72,78,84,90,95) ylabel(.2,.4,.6,.8,1) l1(Probability of Voting) gap(3) b2(Age of Respondent): class member function not found r(4023); end of do-file r(4023); Could you solve this problem? Thanks for your time and reply in advance. diqing Ph.D. Candidate Department of Political Science Texas A&M University 2010 Allen Building College Station TX 77843-4348 Phone: 979-739-4028 <<turnout.dta>> <<turnout.do>> <<turnout.smcl>>