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Date:         Sat, 8 May 2010 11:00:57 -0700
Reply-To:     Arthur Tabachneck <art297@NETSCAPE.NET>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Arthur Tabachneck <art297@NETSCAPE.NET>
Subject:      SAS insufficient memory
In-Reply-To:  <>
Content-Type: text/plain; charset=ISO-8859-1

The following was posted on Google Lists:

---------- Forwarded message ---------- From: Ha Nguyen <> Date: Apr 18, 2:57 pm Subject: SAS insufficient memory To:

Dear SAS users,

I am carrying out a multilevel analysis using proc mixed, SAS 9.2 on window XP pro 64 bit, 4G ram. It's a 4 level model of 4 testing times (level 1) of 3000 students (level 2) living in 1500 neighborhoods (level 3) and studying in 300 school (level 4). My sas code is: Proc mixed data=school method=ml noclprint; class studentid neighbourhood schoolid; model math=time time*time/solution ddfm=bw; random int time/ sub= schoolid type=un; random int time/ sub= neighbourhood (schoolid) type=un; random int time/ sub= studentid (neighbourhood) type=un; run;

I use -memsize 0 option. Before running the analysis, I checked the proc option group= memory and got the infor that memsize=3947950080.

However, when I ran the model, I still got the error message: "Unable to allocate sufficient memory: a request for 1139885k bytes exceeded the 786430k available......."

Could you please advise me any solution to this?

With thanks and best regards, Nguyen Thu Ha KU Leuven

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