Problem Note 42805: PROC MIXED incorrectly produces predicted values as 0 for certain situations
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PROC MIXED might produce incorrect predicted values as 0 for a new subject in the input dataset. The following must be true for this problem to occur:
For example, suppose the data contains a treatment effect TRT. TRT has 2 levels observed in the input dataset, A and B. However, there exists at least one subject on which no dependent variable data was collected. The observations for the dependent variable on this subject have all missing values. This subject also has a new level of TRT, C. With a REPEATED statement and the OUTP= option on the model statement, then this and other subjects in the data that have all missing values for the dependent variable might have predictions set to 0 in the OUTP= dataset.
To circumvent the problem, delete those observations that have both missng response and a new level of fixed effect.
A hot fix is available for this issue. Click on the Hot Fix tab above to download the hot fix.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | SAS/STAT | z/OS | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 |
| Microsoft® Windows® for 64-Bit Itanium-based Systems | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 Datacenter 64-bit Edition | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 Enterprise 64-bit Edition | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows XP 64-bit Edition | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft® Windows® for x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 Datacenter Edition | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 Enterprise Edition | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 Standard Edition | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 for x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2008 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2008 for x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows XP Professional | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Enterprise 32 bit | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Enterprise x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Home Premium 32 bit | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Home Premium x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Professional 32 bit | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Professional x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Ultimate 32 bit | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows 7 Ultimate x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows Vista | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Windows Vista for x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| 64-bit Enabled AIX | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| 64-bit Enabled HP-UX | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| 64-bit Enabled Solaris | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| HP-UX IPF | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Linux | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Linux for x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| OpenVMS on HP Integrity | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Solaris for x64 | 9.22 | 9.3 | 9.2 TS2M3 | 9.3 TS1M0 | ||
A fix for this issue for SAS/STAT 9.22 is available at:
http://ftp.sas.com/techsup/download/hotfix/HF2/B80.html#42805| Type: | Problem Note |
| Priority: | high |
| Date Modified: | 2011-04-27 14:18:11 |
| Date Created: | 2011-03-28 21:14:17 |