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Problem Note 53123: PROC NLMIXED might produce incorrect predicted values when the data is not sorted by the SUBJECT= variable

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Beginning in SAS 9.4 TS1M1 (SAS/STAT 13.1), PROC NLMIXED no longer requires the input data set to be sorted by the SUBJECT= variable (specified in the RANDOM statement). The results should be the same whether the data set is sorted by subject or not. However, if the data set is not sorted by the SUBJECT= variable, certain results might be incorrect. In particular, predicted values produced by the PREDICT statement and random effect predictions produced by the OUT= option in the RANDOM statement might be incorrect.

To circumvent this problem, sort the input data set by the SUBJECT= variable before running PROC NLMIXED.

A hotfix is planned for this issue.



Operating System and Release Information

Product FamilyProductSystemProduct ReleaseSAS Release
ReportedFixed*ReportedFixed*
SAS SystemSAS/STATz/OS13.113.29.4 TS1M19.4 TS1M2
Microsoft® Windows® for x6413.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8 Enterprise 32-bit13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8 Enterprise x6413.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8 Pro 32-bit13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8 Pro x6413.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8.1 Enterprise 32-bit13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8.1 Enterprise x6413.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8.1 Pro13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows 8.1 Pro 32-bit13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows Server 200813.113.29.4 TS1M19.4 TS1M2
Microsoft Windows Server 2008 R213.113.29.4 TS1M19.4 TS1M2
Microsoft Windows Server 2008 for x6413.113.29.4 TS1M19.4 TS1M2
Microsoft Windows Server 2012 Datacenter13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows Server 2012 R2 Datacenter13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows Server 2012 R2 Std13.113.29.4 TS1M19.4 TS1M2
Microsoft Windows Server 2012 Std13.113.29.4 TS1M19.4 TS1M2
Windows 7 Enterprise 32 bit13.113.29.4 TS1M19.4 TS1M2
Windows 7 Enterprise x6413.113.29.4 TS1M19.4 TS1M2
Windows 7 Home Premium 32 bit13.113.29.4 TS1M19.4 TS1M2
Windows 7 Home Premium x6413.113.29.4 TS1M19.4 TS1M2
Windows 7 Professional 32 bit13.113.29.4 TS1M19.4 TS1M2
Windows 7 Professional x6413.113.29.4 TS1M19.4 TS1M2
Windows 7 Ultimate 32 bit13.113.29.4 TS1M19.4 TS1M2
Windows 7 Ultimate x6413.113.29.4 TS1M19.4 TS1M2
64-bit Enabled AIX13.113.29.4 TS1M19.4 TS1M2
64-bit Enabled Solaris13.113.29.4 TS1M19.4 TS1M2
HP-UX IPF13.113.29.4 TS1M19.4 TS1M2
Linux for x6413.113.29.4 TS1M19.4 TS1M2
Solaris for x6413.113.29.4 TS1M19.4 TS1M2
* 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.