A few weeks back, there was a post about not getting sas to run on FC5 (at least, i386 architechtures). The final word seemed to come down to whether the OS had support for (depricated) linux threads. I have just re-installed FC5 from the iso files I copied perhaps a month ago. The kernel version seems to be 2.6.15-1.2054. the text below is clipped from the sas log file of a sucessful batch job run on that installation. I re-installed FC5 because when I did an update of some parts of FC5, sas no longer worked. So it would seem that 2.6.15-1.2054_FC5 is on the cusp of acceptability to Sas. That, or I would need to recompile later kernels and see if I can include linux thread support, something that I am not prepared to do. 1 The SAS System 11:58 Wednesday, May 24, 2006 NOTE: Copyright (c) 2002-2003 by SAS Institute Inc., Cary, NC, USA. NOTE: SAS (r) 9.1 (TS1M3) Licensed to XXXXXXXXX XXXXXXXXXX, Site nnnnnnnnnn. NOTE: This session is executing on the Linux 2.6.15-1.2054_FC5 platform. <some news text clipped out> NOTE: SAS initialization used: real time 0.13 seconds cpu time 0.06 seconds 1 data test; 2 do n = 1 to 10; 3 output ; 4 end; 5 run; NOTE: The data set WORK.TEST has 10 observations and 1 variables. NOTE: DATA statement used (Total process time): real time 0.02 seconds cpu time 0.03 seconds 6 NOTE: SAS Institute Inc., SAS Campus Drive, Cary, NC USA 27513-2414 NOTE: The SAS System used: real time 0.16 seconds cpu time 0.09 seconds I hope this helps the original poster, and doens't just add to confusion. It seems, in summary, that you don't need to go back to 7.1 to get sas to work on the i386 platform. Ron Confidentiality: This email message may contain confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmissions cannot be guaranteed to be secure or error free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept any liability for errors or omissions in the contents of this message that arise as a result of email transmissions. If verification is required please request a hard copy version.