PROC MIXED returns incorrect results when you have a RANDOM statement, and a REPEATED statement with no repeated effect specified, and any one of the following situations:

• the response variable has a missing value for the first observation for the 2nd subject and/or any subsequent subject, or
• WEIGHT statement and the WEIGHT variable has a missing value for the first observation for the 2nd subject and/or any subsequent subject, or
• INFLUENCE option in the MODEL statement.

The circumvention is to always specify the repeated effect in the REPEATED statement.

The problem has been fixed in SAS 9.2 TS2M2.

Operating System and Release Information

Product Family	Product	System	SAS Release
			Reported	Fixed*
SAS System	SAS/STAT	OpenVMS VAX	8.2 TS2M0	9.2 TS2M2
		OS/2	8.2 TS2M0
		Microsoft Windows 95/98	8.2 TS2M0
		Microsoft Windows 2000 Advanced Server	8.2 TS2M0
		Microsoft Windows 2000 Datacenter Server	8.2 TS2M0
		Microsoft Windows 2000 Server	8.2 TS2M0
		Microsoft Windows 2000 Professional	8.2 TS2M0
		Windows Millennium Edition (Me)	8.2 TS2M0
		64-bit Enabled AIX	8.2 TS2M0	9.2 TS2M2
		64-bit Enabled HP-UX	8.2 TS2M0	9.2 TS2M2
		64-bit Enabled Solaris	8.2 TS2M0	9.2 TS2M2
		ABI+ for Intel Architecture	8.2 TS2M0	9.2 TS2M2
		AIX	8.2 TS2M0	9.2 TS2M2
		HP-UX	8.2 TS2M0	9.2 TS2M2
		IRIX	8.2 TS2M0	9.2 TS2M2
		Linux	8.2 TS2M0	9.2 TS2M2
		OpenVMS Alpha	8.2 TS2M0	9.2 TS2M2
		Solaris	8.2 TS2M0	9.2 TS2M2
		Tru64 UNIX	8.2 TS2M0	9.2 TS2M2
		Microsoft Windows NT Workstation	8.2 TS2M0
		Microsoft Windows Server 2003 Datacenter Edition	8.2 TS2M0	9.2 TS2M2
		Microsoft Windows Server 2003 Enterprise Edition	8.2 TS2M0	9.2 TS2M2
		Microsoft Windows Server 2003 Standard Edition	8.2 TS2M0	9.2 TS2M2
		Microsoft Windows XP Professional	8.2 TS2M0	9.2 TS2M2
		z/OS	8.2 TS2M0	9.2 TS2M2

* 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.

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PROC MIXED returns incorrect results when the model has a RANDOM statement, and a REPEATED statement with no repeated effect, and one of the following: missing values in certain position for the response variable or the WEIGHT variable, or you have the INFLUENCE option in the MODEL statement.

Type:	Problem Note
Priority:	alert

Date Modified:	2011-02-23 10:09:32
Date Created:	2009-03-13 11:06:02