Problem Note 5132: PROC MIXED May Report Wrong Satterthwaite or KR Degrees of Freedom with
Heterogeneous Covariance Structures on the RANDOM statement
PROC MIXED will report incorrect degrees of freedom when
DDFM=SATTERTHWAITE or DDFM=KR is used with a heterogeneous covariance
structure (CSH, ARH(1) or TOEPH) in conjunction with the SOLUTION option
on the RANDOM statement or with the OUTP= option on the MODEL statement.
To circumvent the problem, remove the SOLUTION option from the RANDOM
statement.
A Technical Support hot fix for Release 8.2 TSLEVEL TS2M0 for this
issue is available at:
http://www.sas.com/techsup/download/hotfix/82_sbcs_prod_list.html#005132
For customers running SAS with Asian Language Support (DBCS), this
hot fix should be downloaded from:
http://www.sas.com/techsup/download/hotfix/82_dbcs_prod_list.html#005132
Operating System and Release Information
| SAS System | SAS/STAT | OpenVMS Alpha | 8 TS M0 | 9 |
| CMS | 8 TS M0 | |
| 64-bit Enabled HP-UX | 8 TS M0 | |
| HP-UX | 8 TS M0 | |
| ABI+ for Intel Architecture | 8 TS M0 | |
| Linux | 8.2 TS2M0 | |
| z/OS | 8 TS M0 | 9 |
| OS/2 | 8 TS M0 | |
| IRIX | 8 TS M0 | |
| 64-bit Enabled Solaris | 8 TS M0 | |
| Solaris | 8 TS M0 | |
| OpenVMS VAX | 8 TS M0 | |
| Microsoft Windows 2000 Advanced Server | 8 TS M0 | 9 |
| Microsoft Windows 2000 Datacenter Server | 8 TS M0 | 9 |
| Microsoft Windows NT Workstation | 8 TS M0 | 9 |
| Microsoft Windows 95/98 | 8 TS M0 | |
| Microsoft Windows 2000 Server | 8 TS M0 | 9 |
| Windows Millennium Edition (Me) | 8.2 TS2M0 | |
| Microsoft Windows 2000 Professional | 8 TS M0 | 9 |
| 64-bit Enabled AIX | 8 TS M0 | |
| Tru64 UNIX | 8 TS M0 | 9 |
| AIX | 8 TS M0 | |
*
For software releases that are not yet generally available, the Fixed
Release is the software release in which the problem is planned to be
fixed.
| Type: | Problem Note |
| Priority: | alert |
| Topic: | Analytics ==> Regression
Analytics ==> Analysis of Variance
Analytics ==> Longitudinal Analysis
SAS Reference ==> Procedures ==> MIXED
Analytics ==> Mixed Models
Analytics ==> Spatial Analysis
|
| Date Modified: | 2002-04-29 14:48:51 |
| Date Created: | 2001-06-01 13:43:00 |
