If an input data set used in SAS^® Enterprise Miner^TM has variable names that are greater than 28 characters, and if two or more variable names are identical in the first 28 characters, the Impute node creates multiple imputed variables with the same name. The new variable name consists of a prefix of IMP_ followed by the first 28 characters of the original variable. Therefore, if two variables are exactly the same in the first 28 characters, only 1 imputed variable is created.

This is not correct. It should create an unique imputed variable name for each unique variable.

There are no warnings or errors to indicate the problem has occurred.

For example, suppose the Input Data Source has the following input variables:

   THIS_IS_LONG_VARIABLE_NAME_XX_1
   THIS_IS_LONG_VARIABLE_NAME_XX_2

The Input node will assign both variables the same name:

   IMP_THIS_IS_LONG_VARIABLE_NAME_X

Select the Hot Fix tab in this note to access the hot fix for this issue.

Operating System and Release Information

Product Family	Product	System	Product Release		SAS Release
			Reported	Fixed*	Reported	Fixed*
SAS System	SAS Enterprise Miner	Microsoft Windows XP Professional	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows NT Workstation	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft® Windows® for 64-Bit Itanium-based Systems	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows Server 2003 Standard Edition	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows 2000 Server	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows Server 2003 Datacenter Edition	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows Server 2003 Enterprise Edition	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows 2000 Datacenter Server	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows 2000 Professional	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Microsoft Windows 2000 Advanced Server	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Solaris	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		64-bit Enabled Solaris	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		HP-UX	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Linux	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		HP-UX IPF	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		64-bit Enabled HP-UX	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		AIX	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		Tru64 UNIX	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4
		64-bit Enabled AIX	5.2	5.3	9.1 TS1M3	9.1 TS1M3 SP4

* 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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A fix for this issue for SAS Enterprise Miner Server 5.2 is available at:

http://www.sas.com/techsup/download/hotfix/dmine52.html#017600

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Type:	Problem Note
Priority:	high
Topic:	Analytics ==> Data Mining Analytics ==> Missing Value Imputation

Date Modified:	2008-03-14 13:10:26
Date Created:	2006-05-01 13:47:39