Dear folks, I need a help for a problem running proc model. For a same code and a same dataset, my SAS 9.4(TS1M2) runs for 7 mintues while SAS 9.3(TS1M0) runs for just 1 second. Anybody can tell me why? Is it a bug to SAS 9.4 proc model? Since my institution is no longer supporting SAS 9.3, I am forced to use SAS 9.4 now and hence I really need this problem solved. Thank you and look forward to your help. My computer is 64 bit Windows 7 professional and SAS 9.3. 9.4 are both 64 bit. I attach in this post the simple code and dataset I used to test. You can try SAS 9.3 and SAS 9.4 to see my problem. ... View more