In the experimental procedure PROC TPHREG in SAS9.1 and in PROC PHREG in SAS9.2, if you specify a WHERE statement with a leading parenthesis a syntax error will result.

For example, the following WHERE statement will produce a syntax error in PROC PHREG in SAS9.2:

   where (age=1 or age=2) and x='A';

To avoid the problem, rewrite the condition so that it does not begin with a parenthesis or use a WHERE clause instead. Several alternatives to the above WHERE statement are shown below:

1. Reorder the WHERE statement:
   

      where x='A' and (age=1 or age=2);

2. Rewrite the WHERE statement so it begins with a condition that is always true:
   

      where 1 and (age=1 or age=2) and x='A';

3. Specify the condition in a WHERE clause as a data set option on the PROC PHREG statement:
   

      proc phreg data=a(where=((age=1 or age=2) and x='A'));

4. Apply the WHERE statement in a prior DATA step.

Operating System and Release Information

Product Family	Product	System	SAS Release
			Reported	Fixed*
SAS System	SAS/STAT	z/OS	9.1 TS1M0
		Microsoft® Windows® for 64-Bit Itanium-based Systems	9.1 TS1M0
		Microsoft Windows Server 2003 Datacenter 64-bit Edition	9.1 TS1M0
		Microsoft Windows Server 2003 Enterprise 64-bit Edition	9.1 TS1M0
		Microsoft Windows 2000 Advanced Server	9.1 TS1M0
		Microsoft Windows 2000 Datacenter Server	9.1 TS1M0
		Microsoft Windows 2000 Server	9.1 TS1M0
		Microsoft Windows 2000 Professional	9.1 TS1M0
		Microsoft Windows NT Workstation	9.1 TS1M0
		Microsoft Windows Server 2003 Datacenter Edition	9.1 TS1M0
		Microsoft Windows Server 2003 Enterprise Edition	9.1 TS1M0
		Microsoft Windows Server 2003 Standard Edition	9.1 TS1M0
		Microsoft Windows XP Professional	9.1 TS1M0
		64-bit Enabled AIX	9.1 TS1M0
		64-bit Enabled HP-UX	9.1 TS1M0
		64-bit Enabled Solaris	9.1 TS1M0
		HP-UX IPF	9.1 TS1M0
		Linux	9.1 TS1M0
		OpenVMS Alpha	9.1 TS1M0
		Tru64 UNIX	9.1 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.

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With the advent of the CLASS statement, a leading parenthesis in a WHERE statement produces a syntax error and is not allowed.

Type:	Problem Note
Priority:	medium
Topic:	Analytics ==> Survival Analysis SAS Reference ==> Procedures ==> PHREG SAS Reference ==> Procedures ==> TPHREG

Date Modified:	2010-03-02 13:04:21
Date Created:	2010-03-01 18:07:44