Date:         Wed, 22 Mar 2000 20:56:20 GMT
Reply-To:     Dale McLerran <dmclerra@FHCRC.ORG>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Dale McLerran <dmclerra@FHCRC.ORG>
Organization: Fred Hutchinson Cancer Research Center
Subject:      Re: Help needed: proc mixed

[posted and mailed]

astong1NOasSPAM@po-box.mcgill.ca.invalid (astonge) wrote in
<0d7a716e.3910a723@usw-ex0108-061.remarq.com>:

>My proc mixed analysis stopped because of
>infinite likelihood. Does anyone know what
>could cause the problem? I have in my model
>both classification and continuous variables.
>
>
>
>* Sent from AltaVista http://www.altavista.com Where you can also find
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According to the documentation on PROC MIXED, an infinite likelihood
can occur for either of two reasons: 1) you are employing a REPEATED
statement, but some subjects have multiple occurences of the
repeated effect, or 2) you have removed some boundary constraints
using NOBOUND, LOWERB, or UPPERB on the PARMS statement and the
procedure finds some condition that it cannot properly evaluate.

--
Dale McLerran                            dmclerra@fhcrc.org
Fred Hutchinson Cancer Research Center   ph:  (206) 667-2926
Seattle, WA 98109                        fax: (206) 667-5977