Problem Note 64523: The HPMIXED procedure generates incorrect results when there are multiple observations on a subject for the same level of the repeated effect
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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 | ||||
A fix for this issue for SAS/STAT 15.1 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/E8U.html#64523
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 |