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Research and Statistical Support

SAS Corner

By Dr. Karl Ho, Research and Statistical Support Services Manager

What is Hot Fix?

On a regular basis, SAS upgrades the software and releases new versions to licensed customers.  However, what if bugs are identified between the releases? Hot Fix is provided by the company that fills the gap. The Technical Support at SAS defines Hot Fix as addressing "specific alert issues uncovered by customers' applications". According to SAS, "while the hot fixes would have been tested and are fully supported, they have not gone through the full QA process". As a responsible measure, the company mails alert notes to licensees when a bug is located. It will also provide solutions (fix) for the bug or give information on how to download a patch. Two sample Hot Fix alert notes were appended at the bottom of this article.

Hot Fix for bugs can be procedure-related. For instance, the latest Hot Fix is on the accuracy of a Kendall's tau b, a crosstabulation statistics for two variables, generated in the PROC CORR procedure. The Hot Fix message reminds users of the problem and gives suggestions to circumvent the inaccurate output. In some cases, the Technical Support will provide patches (hot fix bundle) to fix the problem. But in most cases, it recommends waiting for the next release which will incorporate the fixed procedures, unless a problem is encountered.

To get more details on Hot Fix or locate a bug, visit the Hot Fix website. Or you can subscribe to the Hot Fix Alert mailing list.

With frequent bug reports, it may appear that the software is prone with defects. From the other prospective,  it also indicate the company spends a lot of effort in keeping the customers abreast of the bugs and newest fixes to show good will and responsibility. Not a lot of software companies have the courage to provide customers what they need to know. SAS certainly is well ahead on this.

Sample Hot Fix alert notes:

With Hot Fix Releases:

From: 	SAS Technical Support <tsdlist@UNX.SAS.COM>
To:	<TSNEWS-L@VM.SAS.COM>
Date: 	8/2/02 1:32PM
Subject: 	SAS Institute TS: New Hot Fix Releases

New Hot Fixes are available on the Technical Support Hot Fix Web site
for SAS Release 8.2 (TS2M0).

The latest SAS Release 8.2 (TS2M0) Hot Fixes are for:

SAS/ACCESS INTERFACE TO DB2 (OS/390 only)
SAS/ACCESS INTERFACE TO INFORMIX (UNIX only)
BASE SAS (Windows and UNIX)

For more information, please review the Release 8.2 (TS2M0) Hot Fix
"What's New" page:
http://www.sas.com/techsup/download/hotfix/82_SBCS_whats_new.html

If you are running SAS with Asian Language Support (DBCS), please
review the DBCS "What's New" page:
http://www.sas.com/techsup/download/hotfix/82_DBCS_whats_new.html


A comprehensive list of all Hot Fixes is available at:
http://www.sas.com/techsup/download/hotfix/hotfix.html

Alert Note only:

@

From: 	SAS Technical Support <tsdlist@UNX.SAS.COM>
To:	<TSNEWS-L@VM.SAS.COM>
Date: 	8/5/02 11:52AM
Subject: 	SAS Institute Alert Note SN-008065

SN-008065                            ***Alert Sas Note***

Kendall Partial Tau b Correlation Coefficients are incorrect when a
variable has zero variance and the PARTIAL statement is used


Product: Base SAS
Component: CORR procedure
Priority: ALERT


  If you are using a PARTIAL statement, and if any of the analysis
  variables have a standard deviation of zero, then the Kendall Partial
  Tau b Correlation Coefficients are incorrect.  The coefficients that are
  produced are actually the unpartialed Kendall's Tau b correlations.

  To circumvent the problem, remove the variables for which the STD Dev is
  zero.


Keywords:
  incorrout incorrstat kendall tau b correlation partial
  kendall partial tau b correlation coefficients are incorrect when a
  variable has zero variance and the partial statement is used
  008065 8065

SAS Note Revised On:   Thu, 25 Jul 2002


System                                   Version Reported  Version Fixed

AIX 64 bit                               8.2  TS2M0
AIX/6000                                 7  TSP1
AIX/6000                                 8  TSM0
AIX/6000                                 8.1  TS1M0
AIX/6000                                 8.2  TS2M0
VM/ESA (CMS)                             7  TSP1
VM/ESA (CMS)                             8  TSM0
VM/ESA (CMS)                             8.1  TS1M0
VM/ESA (CMS)                             8.2  TS2M0
Compaq Tru64 UNIX                        7  TSP1
Compaq Tru64 UNIX                        8  TSM0
Compaq Tru64 UNIX                        8.1  TS1M0
Compaq Tru64 UNIX                        8.2  TS2M0
HP-UX Operating Systems                  7  TSP1
HP-UX Operating Systems                  8  TSM0
HP-UX Operating Systems                  8.1  TS1M0
HP-UX Operating Systems                  8.2  TS2M0
HP-UX 64 bit                             8.2  TS2M0
Intel ABI                                8  TSM0
Intel ABI                                8.1  TS1M0
Intel ABI                                8.2  TS2M0
Linux                                    8.2  TS2M0
MIPS ABI                                 8  TSM0
MIPS ABI                                 8.1  TS1M0
MIPS ABI                                 8.2  TS2M0
OS/390 (MVS)                             7  TSP1
OS/390 (MVS)                             8  TSM0
OS/390 (MVS)                             8.1  TS1M0
OS/390 (MVS)                             8.2  TS2M0
IBM OS/2                                 7  TSP1
IBM OS/2                                 8  TSM0
IBM OS/2                                 8.1  TS1M0
IBM OS/2                                 8.2  TS2M0
Solaris                                  7  TSP1
Solaris                                  8  TSM0
Solaris                                  8.1  TS1M0
Solaris                                  8.2  TS2M0
Solaris 64 bit                           8.2  TS2M0
OpenVMS VAX                              7  TSP1
OpenVMS VAX                              8  TSM0
OpenVMS VAX                              8.1  TS1M0
OpenVMS VAX                              8.2  TS2M0
OpenVMS Alpha                            7  TSP1
OpenVMS Alpha                            8  TSM0
OpenVMS Alpha                            8.1  TS1M0
OpenVMS Alpha                            8.2  TS2M0
Windows NT                               7  TSP1
Windows NT                               8  TSM0
Windows NT                               8.1  TS1M0
Windows NT                               8.2  TS2M0
Windows 2000 Datacenter Server           8  TSM0
Windows 2000 Datacenter Server           8.1  TS1M0
Windows 2000 Datacenter Server           8.2  TS2M0
Windows 2000 Professional                8  TSM0
Windows 2000 Professional                8.1  TS1M0
Windows 2000 Professional                8.2  TS2M0
Windows 2000 Server and Advanced Server  8  TSM0
Windows 2000 Server and Advanced Server  8.1  TS1M0
Windows 2000 Server and Advanced Server  8.2  TS2M0
Windows 95                               7  TSP1
Windows 95                               8  TSM0
Windows 95                               8.1  TS1M0
Windows 95                               8.2  TS2M0
Windows 98                               7  TSP1
Windows 98                               8  TSM0
Windows 98                               8.1  TS1M0
Windows 98                               8.2  TS2M0
Windows ME                               8.2  TS2M0
Windows XP                               8.2  TS2M0


No Fixes Available