NOTE: Copyright (c) 2002-2012 by SAS Institute Inc., Cary, NC, USA. NOTE: SAS (r) Proprietary Software 9.4 (TS1M2) NOTE: This session is executing on the Linux 3.10.0-957.27.2.el7.x86_64 (LIN X64) platform.   I'm trying to impute students' test scores across 3 different tests at 6 points in time. The missing data rate is no smaller than 2/3. I have 455,959 observations, and 18 variables. Here is the code I'm using:   proc mi data=thedata out=theoutput ; var <list of variables> ; fcs regpmm; When I run this I get a 0-length log file, 47234 lines of output in the lst file, no messages at the console. The output is produced during the first minute the program runs, and then stops in the middle of the output table. It was been like this for the last 51 hours. At the same time, the program continues to eat up CPU time. As of this time the SAS process has used up 1560 minutes of CPU time. Since there is no log file and no messages at the console, I have no idea how to even start figuring out what the problem is. I know it's not a log-redirection problem because when I run other SAS jobs, the log is produced as expected. Can anyone give me some help? TIA ... View more