Problem Note 31400: Resetting system time backwards causes negative "real time" value in STIMER output
If the system time is set backwards to a negative value
while a SAS DATA step or procedure is running, the "real time" value
reported in the SAS log will be negative.
When this situation occurs, the real time value is reported as a very
large number, as this example shows:
1? data; x=1; run;
NOTE: The data set WORK.DATA1 has 1 observations and 1 variables.
NOTE: DATA statement used (Total process time):
real time 5124095575644:11:23.65
cpu time 0.04 seconds
On HP Itanium systems, a Domain error occurs.
Beginning with SAS 9.2 (9.2 TS1M0), the same situation will instead produce the following
output:
1? data; x=1; run;
NOTE: The data set WORK.DATA1 has 1 observations and 1 variables.
NOTE: DATA statement used (Total process time):
real time Unknown due to possible time adjustment
cpu time 0.04 seconds
Operating System and Release Information
| SAS System | N/A | Microsoft® Windows® for 64-Bit Itanium-based Systems | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows Server 2003 Datacenter 64-bit Edition | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows Server 2003 Enterprise 64-bit Edition | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows XP 64-bit Edition | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft® Windows® for x64 | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows 2000 Advanced Server | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows 2000 Datacenter Server | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows 2000 Server | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows 2000 Professional | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows NT Workstation | 9.1 TS1M3 SP1 | |
| Microsoft Windows Server 2003 Datacenter Edition | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows Server 2003 Enterprise Edition | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows Server 2003 Standard Edition | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Microsoft Windows XP Professional | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Windows Vista | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| 64-bit Enabled AIX | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| 64-bit Enabled HP-UX | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| 64-bit Enabled Solaris | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| AIX | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| HP-UX | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| HP-UX IPF | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Linux | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Linux on Itanium | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Solaris for x64 | 9.1 TS1M3 SP1 | 9.2 TS1M0 |
| Tru64 UNIX | 9.1 TS1M3 SP1 | 9.2 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.
| Type: | Problem Note |
| Priority: | medium |
| Date Modified: | 2008-05-09 10:55:07 |
| Date Created: | 2008-03-06 12:53:14 |
