https://communities.sas.com/t5/SAS-Procedures/phreg-assess/m-p/73473#M21289 check under "computational resources" in the PHREG documentation. You probably need more memory to get it to run faster. Wed, 11 Feb 2009 00:36:19 GMT Doc_Duke 2009-02-11T00:36:19Z https://communities.sas.com/t5/SAS-Procedures/phreg-assess/m-p/73472#M21288 I am trying to use the assess statement in proc phreg to test for proportionality. When I use the example program provided by SAS, it works and show me the result fast. But when I work only own data, which is much larger than the example dataset, it took very long time (hours) to show me the result. Anybody know what is wrong with it? Tue, 10 Feb 2009 16:58:55 GMT https://communities.sas.com/t5/SAS-Procedures/phreg-assess/m-p/73472#M21288 deleted_user 2009-02-10T16:58:55Z https://communities.sas.com/t5/SAS-Procedures/phreg-assess/m-p/73473#M21289 check under "computational resources" in the PHREG documentation. You probably need more memory to get it to run faster. Wed, 11 Feb 2009 00:36:19 GMT https://communities.sas.com/t5/SAS-Procedures/phreg-assess/m-p/73473#M21289 Doc_Duke 2009-02-11T00:36:19Z