All of the results generated by PROC HPMIXED are incorrect if a subject has more than one observation for a level of the repeated effect in the REPEATED statement. In a repeated measures model, a subject should have at most one observation for each level of the repeated effect. For example, if the repeated effect is time and subjects are measured across five time points, each subject can have at most five observations with one observation per time point.

If a time point for a subject has more than one observation, PROC HPMIXED should instead produce no output and write a message to the SAS log.

Click the Hot Fix tab in this note to access the hot fix for this issue.

Operating System and Release Information

Product Family	Product	System	Product Release		SAS Release
			Reported	Fixed*	Reported	Fixed*
SAS System	SAS/STAT	64-bit Enabled AIX	9.3		9.3 TS1M0
		Windows Vista for x64	9.3		9.3 TS1M0
		Windows Vista	9.3		9.3 TS1M0
		Windows 7 Ultimate x64	9.3		9.3 TS1M0
		Microsoft Windows Server 2008 for x64	9.3		9.3 TS1M0
		Microsoft Windows Server 2008 R2	9.3		9.3 TS1M0
		Microsoft Windows Server 2008	9.3		9.3 TS1M0
		Microsoft Windows Server 2003 for x64	9.3		9.3 TS1M0
		Microsoft Windows Server 2003 Standard Edition	9.3		9.3 TS1M0
		Microsoft Windows Server 2003 Enterprise Edition	9.3		9.3 TS1M0
		Microsoft Windows Server 2003 Datacenter Edition	9.3		9.3 TS1M0
		Microsoft® Windows® for x64	9.3		9.3 TS1M0
		Windows 7 Ultimate 32 bit	9.3		9.3 TS1M0
		Windows 7 Professional x64	9.3		9.3 TS1M0
		Windows 7 Professional 32 bit	9.3		9.3 TS1M0
		Windows 7 Home Premium x64	9.3		9.3 TS1M0
		Windows 7 Home Premium 32 bit	9.3		9.3 TS1M0
		Windows 7 Enterprise x64	9.3		9.3 TS1M0
		Windows 7 Enterprise 32 bit	9.3		9.3 TS1M0
		Microsoft Windows XP Professional	9.3		9.3 TS1M0
		z/OS	9.3		9.3 TS1M0
		Solaris for x64	9.3		9.3 TS1M0
		Linux for x64	9.3		9.3 TS1M0
		HP-UX IPF	9.3		9.3 TS1M0
		Linux	9.3		9.3 TS1M0
		64-bit Enabled Solaris	9.3		9.3 TS1M0
		64-bit Enabled HP-UX	9.3		9.3 TS1M0

* 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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A fix for this issue for SAS/STAT 15.1 is available at:

https://tshf.sas.com/techsup/download/hotfix/HF2/E8U.html#64523

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PROC HPMIXED should stop processing when any subject has more than one observation for any level of the repeated effect. The procedure does not stop in this situation and the output from the procedure is incorrect.

Type:	Problem Note
Priority:	alert
Topic:	Analytics ==> Mixed Models SAS Reference ==> Procedures ==> HPMIXED

Date Modified:	2019-11-14 12:35:58
Date Created:	2019-07-26 15:31:12